module/hyprtoolkit: toolkit to configure various wayland applications.

[rachitvrma]

Description

hyprtoolkit is a GUI toolkit for developing applications that run natively on Wayland.
It’s specifically made for Hyprland’s needs, but will generally run on any Wayland compositor that supports modern standards.

(Previously opened as #9736, which got closed and locked by accident while I was still pushing commits — no review had started, so opening fresh here.)

Checklist

• Change is backwards compatible.

• Code formatted with nix fmt or
  nix-shell -A dev --run treefmt.

• Code tested through nix build .#test-all
  or a targeted nix run .#tests -- <pattern>.

• Test cases updated/added. See example.

• Commit messages are formatted like

  {component}: {description}
  
  {long description}
  

  See CONTRIBUTING for more information and recent commit messages for examples.

• If this PR adds a new module

  • Added myself as module maintainer. See example.
  • Generate a news entry. See News
  • Basic tests added. See Tests

• If this PR adds an exciting new feature or contains a breaking change.

  • Generate a news entry. See News