feat: app settings

[jarekdanielak]

Proposed Changes

This lays a foundation for allowing components and plugins to utilize app settings.

Includes:

• Settings config provider to read and write settings.json
• Settings API as a central place to store and control settings.
• Settings Plugin with UI (modal) to change settings.
• Example of providing and using settings by client-test plugin.

To do:

• Refactor and clean up in the Settings API
• Add (some) flags as settings
• Auto-save feature
• Search feature
• Only save / call listeners / write file when the new values are different
• UI design
• Tests

Closes #2913

Related to https://github.com/camunda/product-hub/issues/2491

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}

[jarekdanielak]

This is still very much work in progress, but you can already bring the modal with Cmd/Ctrl + , and change the color of the heart icon in the status bar or force cloud BPMN editor linting.

[jarekdanielak]

Some implementation details were discussed in our Hour of Code.

[barmac]

Cmd/Ctrl + ,

Good one. This is the same shortcut as in Google Chrome and VSCode.

[nikku]

Cmd/Ctrl + ,

Does not work for me (Linux, German keyboard), no shortcut on Linux / Windows exists for Chrome

[jarekdanielak]

Do we want:

a) Universal shortcut that works for all platforms, but is not a standard across different apps.
b) Standard shortcut for macOS and no / different shortcut for other platforms.

I vote B, but I'm slightly biased. 🍎

Btw. the Settings are also available under the File menu.

[barmac]

@philippfromme How about shortcuts in Windows?

[nikku]

I vote B, but I'm slightly biased. 🍎

Know the context. Shortcuts should pick up folks in the domain / context they operate. No value to unify things. Mac user does not care for 🪟 shortcuts.