build: Add a GHA Linter

Author: esiegel

.Rbuildignore

@@ -4,3 +4,4 @@
 .git
 .github
 misc
+^\.github$

.github/.gitignore

@@ -0,0 +1 @@
+*.html

.github/workflows/lint-project.yaml

@@ -0,0 +1,32 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+name: lint-project.yaml
+
+permissions: read-all
+
+jobs:
+  lint-project:
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          use-public-rspm: true
+
+      - name: Install lintr
+        run: install.packages("lintr")
+        shell: Rscript {0}
+
+      - name: Lint root directory
+        run: lintr::lint_dir()
+        shell: Rscript {0}
+        env:
+          LINTR_ERROR_ON_LINT: true