feat(launcher): Configurable toggle to surface desktop actions in app provider

[TotalyEnglizLitrate]

Summary

Extended AppProvider::query to include DesktopAction results in launcher search. Actions are now scored and ranked alongside their parent applications, with a configurable toggle to show/hide them in config/settings (defaulting to not showing them).

Motivation

Users can now search for and directly launch desktop actions (custom app-specific commands) from the launcher, such as noctalia's settings action.

Type of Change

• Bug fix
• New feature
• Breaking change
• Refactoring
• Build / packaging

Related Issue

N/A

Testing

Opened app launcher and verified behaviour

Manual Coverage

• Tested on Niri
• Tested on Hyprland
• Tested on Sway
• Tested on another compositor:
• Tested with different bar positions and density settings
• Tested at different interface scaling values
• Tested with multiple monitors

Screenshots / Videos

2026-08-03_07-40-38.mp4

(note: renamed the settings label to Show App Actions after this was recorded)

Checklist

• This PR is ready for review, or it is marked as Draft.
• I read and followed the relevant guidance in CONTRIBUTING.md.
• I ran just format with clang-format v22+ installed, or this PR has no code changes.
• I ran the relevant build or test commands, or explained why they were not run.
• I self-reviewed the changes.
• I checked for new warnings or errors.
• I will update end-user documentation after merge, or this PR does not change user-facing configuration or behavior.
• I added or updated assets/translations/en.json, or this PR adds no new user-facing strings.
• I did not edit non-English translation files unless this PR is explicitly for translation tooling, an import/export sync, or a maintainer-requested locale change.
• I used the existing canonical names for config keys, IPC names, paths, and identifiers.

Additional Notes

N/A

[TotalyEnglizLitrate]

rebased for CI test fix

[TotalyEnglizLitrate]

rebased/fixed merge conflict

[TotalyEnglizLitrate]

test failure seems unrelated

[ItsLemmy]

Thanks