fix: Add flutter pub get before dart format to resolve dependencies

Based on dart-lang/sdk#60163, the dart formatter needs to resolve
dependencies before formatting to avoid differences between local
and CI environments. This ensures consistent formatting by having
all package dependencies available during formatting.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ened

.github/workflows/format.yml

@@ -16,9 +16,7 @@ jobs:
           channel: 'stable'
       - name: Format
         run: |
-          echo "=== Git status before formatting ==="
-          git status --porcelain
-          echo "=== Checking if files need formatting ==="
+          flutter pub get
           dart format --set-exit-if-changed .
 
   format_kotlin: