EWW: Taskbar workspaces control

[kajusnau]

Description of changes

1. Added Workspaces Control Script:

   • Introduced a new control script for managing ghaf workspaces in packages/ghaf-workspace.
   • This script is necessary because labwc does not provide commands to control or monitor workspaces directly, apart from keybind functionality.
   • The script keeps track of current workspace and max number of workspaces in separate files under ~/.config/labwc;
   • Active workspace should be remembered between system reboots;

2. Added Workspaces Widget to Taskbar:

   • Added to the top-left section of the taskbar.
   • Displays the active workspace index and allows users to switch workspaces directly from the taskbar.

3. Configured Keybindings for Workspace Switching:

   • Added keybindings for workspace switching:
     • Super + [number] — Switches to the numbered workspace.
     • Super + Alt + Right Arrow — Switches to the next workspace.
     • Super + Alt + Left Arrow — Switches to the previous workspace.

4. Defined Workspaces in Labwc Configuration:

   • Currently limited to two workspaces;
   • Workspaces popup dialog disabled;
   • Disabled default mouse keybind that allowed scrolling through workspaces;

5. Other changes:

   • Reduced the height of the taskbar to match Ghaf UI design (46px -> 36px);

Checklist for things done

• Summary of the proposed changes in the PR description
• More detailed description in the commit message(s)
• Commits are squashed into relevant entities - avoid a lot of minimal dev time commits in the PR
• Contribution guidelines followed
• Ghaf documentation updated with the commit - https://tiiuae.github.io/ghaf/
• PR linked to architecture documentation and requirement(s) (ticket id)
• Test procedure described (or includes tests). Select one or more:
  • Tested on Lenovo X1 x86_64
  • Tested on Jetson Orin NX or AGX aarch64
  • Tested on Polarfire riscv64
• Author has run make-checks and it passes
• All automatic Github Action checks pass - see actions
• Author has added reviewers and removed PR draft status
• Change requires full re-installation
• Change can be updated with nixos-rebuild ... switch

Instructions for Testing

• Try to switch workspaces using the above mentioned keybinds

• Try to reboot system while on workspace id 2 to see if active workspace is remembered;

• Verify two-finger vertical scrolling does not change active workspace;

• List all targets that this applies to:
  Lenovo X1

• Is this a new feature

  • List the test steps to verify:
    Can be tested on Lenovo X1 following usual installation or nixos-rebuild ... switch

• If it is an improvement how does it impact existing functionality?

[leivos-unikie]

Tested on Lenovo-X1 (built fresh image)

• Workspace control seems to work well, as described
• ci-test-automation passed and performance ok