Populate gz_ekumen_worlds package and repository

Signed-off-by: Michel Hidalgo <michel@ekumenlabs.com>

.cmake-format

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+# ----------------------------------
+# Options affecting listfile parsing
+# ----------------------------------
+with section("parse"):
+    # Specify structure for custom cmake functions
+    additional_commands = {
+        'ament_target_dependencies': {
+            'kwargs': {
+                'PUBLIC': '*',
+                'INTERFACE': '*',
+                'SYSTEM': '*',
+            },
+        },
+        'rclcpp_components_register_node': {
+            'pargs': {
+                'nargs': 1,
+            },
+            'kwargs': {
+                'PLUGIN': 1,
+                'EXECUTABLE': 1,
+                'EXECUTOR': 1,
+                'RESOURCE_INDEX': 1,
+            }
+        },
+        'catkin_package': {
+            'flags': [
+                'SKIP_CMAKE_CONFIG_GENERATION',
+                'SKIP_PKG_CONFIG_GENERATION',
+            ],
+            'kwargs': {
+                'INCLUDE_DIRS': '*',
+                'LIBRARIES': '*',
+                'CATKIN_DEPENDS': '*',
+                'DEPENDS': '*',
+                'CFG_EXTRAS': 1,
+                'EXPORTED_TARGETS': '*',
+            }
+        },
+    }
+
+# -----------------------------
+# Options affecting formatting.
+# -----------------------------
+with section("format"):
+    # Force vertical layout if an argument group contains more than this many sub-groups.
+    max_subgroups_hwrap = 2
+    # Force vertical layout if a positional argument group contains more than this many arguments.
+    max_pargs_hwrap = 3
+    # If true, the parsers may infer whether or not an argument list is sortable (without annotation).
+    autosort = True
+
+# ------------------------------------------------
+# Options affecting comment reflow and formatting.
+# ------------------------------------------------
+with section("markup"):
+    # Disable comment markup parsing and reflow.
+    enable_markup = False

.github/CODEOWNERS

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+# More info:
+# https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners
+
+*                     @IDavGal

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Report a bug
+labels: bug
+---
+
+
+## Environment
+* OS Version: <!-- e.g, Ubuntu 22.04 -->
+* Source or binary build?
+  <!-- If binary, which version? -->
+  <!-- If source, which branch and what is the latest commit? -->
+
+## Description
+* Expected behavior: <!-- Tell us what you expected to happen -->
+* Actual behavior: <!-- What happened instead -->
+
+## Steps to reproduce
+<!-- Provide steps so we can try to reproduce this issue -->
+
+1.
+2.
+3.
+
+## Output
+<!-- Provide screenshots, console logs, backtraces, and/or anything that could
+be useful to us resolving this issue -->

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Request a new feature
+labels: enhancement
+---
+
+
+## Desired behavior
+<!-- Describe the current problem and the feature you want implemented.-->
+
+## Alternatives considered
+<!-- Describe alternate solutions or features you've considered.-->
+
+## Implementation suggestion
+<!-- Provide a suggestion on how to implement this feature, which could help us
+expedite this implementation.-->
+
+## Additional context
+<!-- Provide any other additional context (e.g., screenshots) about your feature
+request.-->

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: ":seedling:"

.github/pull_request_template.md

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+<!--
+Please remove the appropriate section.
+For example, if this is a new feature, remove all sections except for the "New feature" section
+
+If this is your first time opening a PR, be sure to check the contribution guide:
+https://github.com/Ekumen-OS/gz-worlds/blob/main/CONTRIBUTING.md
+-->
+
+# 🦟 Bug fix
+
+Fixes #<NUMBER>
+
+## Summary
+<!-- Describe your fix, including an explanation of how to reproduce the bug
+before and after the PR.-->
+
+## Checklist
+- [ ] Signed all commits for DCO
+- [ ] Added tests
+- [ ] Updated documentation (as needed)
+- [ ] Updated migration guide (as needed)
+
+
+🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸
+
+# 🎉 New feature
+
+Closes #<NUMBER>
+
+## Summary
+<!--Explain changes made, the expected behavior, and provide any other additional
+context (e.g., screenshots, gifs) if appropriate.-->
+
+## Test it
+<!--Explain how reviewers can test this new feature manually.-->
+
+## Checklist
+- [ ] Signed all commits for DCO
+- [ ] Added tests
+- [ ] Added example and/or tutorial
+- [ ] Updated documentation (as needed)
+- [ ] Updated migration guide (as needed)

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+# Cancel previously running PR jobs
+concurrency:
+  group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label || github.head_ref || github.ref }}'
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    name: Lint sources
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Setup python
+        uses: actions/setup-python@v5
+        with:
+          cache: pip
+      - name: Install python packages
+        run: pip install pre-commit
+      - name: Run linters
+        run: pre-commit run --all-files --verbose --show-diff-on-failure
+  build-and-test:
+    name: Build & test
+    needs: lint
+    runs-on: ubuntu-24.04
+    container:
+      image: osrf/ros:jazzy-desktop
+    steps:
+       - uses: ros-tooling/setup-ros@v0.7
+         with:
+           required-ros-distributions: jazzy
+       - uses: ros-tooling/action-ros-ci@v0.3
+         with:
+           package-name: gz_ekumen_worlds
+           target-ros2-distro: jazzy
+           import-token: ${{ secrets.GITHUB_TOKEN }}

.pre-commit-config.yaml

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+# Run against all the files: pre-commit run -a
+# Install the git hook scripts: pre-commit install
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+      - id: check-ast
+      - id: check-docstring-first
+      - id: check-executables-have-shebangs
+      - id: check-shebang-scripts-are-executable
+      - id: check-yaml
+        args: [--allow-multiple-documents]
+      - id: check-xml
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+
+  - repo: https://github.com/cheshirekow/cmake-format-precommit
+    rev: v0.6.13
+    hooks:
+      - id: cmake-format
+      - id: cmake-lint