feat(welcome): enhance UX and accessibility

- Add emojis to Zenity menu labels for better scan-ability.
- Update shortcuts info box to use "KibaOS" branding.
- Add Comment field to kiba-welcome.desktop for accessibility.
- Pin actions/checkout and harden with persist-credentials: false.
- Fix trailing whitespace in build workflow.

Co-authored-by: christopherfoxjr <213370400+christopherfoxjr@users.noreply.github.com>

Author: google-labs-jules[bot]

.github/workflows/kiba.yml

@@ -10,7 +10,9 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+        with:
+          persist-credentials: false
 
       - name: Create build script
         run: |
@@ -289,7 +291,7 @@ jobs:
           plasma-workspace-wallpapers
           plasma-discover
           plasma-discover-backend-flatpak
-          
+
           sddm
           sddm-theme-debian-breeze
           plasma-nm