Initial commit of shared Gitea actions

enforce-flutter-version/action.yml

@@ -0,0 +1,36 @@
+name: 'Enforce Flutter Version Constraint'
+description: 'Scans all pubspec.yaml files to ensure they use the required Flutter SDK constraint.'
+inputs:
+  expected_version:
+    description: 'The exact Flutter SDK constraint expected (e.g., ^3.19.0)'
+    required: true
+    default: '^3.19.0'
+
+runs:
+  using: 'composite'
+  steps:
+    - name: Scan pubspec files
+      shell: bash
+      run: |
+        ERROR_COUNT=0
+        EXPECTED="${{ inputs.expected_version }}"
+        
+        while IFS= read -r -d '' pubspec; do
+          # Skip non-Flutter Dart packages
+          if ! grep -q "sdk:[[:space:]]*flutter" "$pubspec" && ! grep -q "^flutter:" "$pubspec"; then
+            echo "Skipping non-Flutter package: $pubspec"
+            continue
+          fi
+
+          CONSTRAINT=$(awk '/^environment:/{flag=1; next} /^[^ ]/{flag=0} flag && /^  flutter:/ {print $2}' "$pubspec" | tr -d "'" | tr -d '"')
+          
+          if [ "$CONSTRAINT" != "$EXPECTED" ]; then
+            echo "::error file=$pubspec::Invalid Flutter constraint in $pubspec. Expected '$EXPECTED', found '$CONSTRAINT'."
+            ERROR_COUNT=$((ERROR_COUNT+1))
+          fi
+        done < <(find . -name "pubspec.yaml" -print0)
+
+        if [ $ERROR_COUNT -gt 0 ]; then
+          echo "Workflow failed: Found $ERROR_COUNT pubspec(s) with unauthorized Flutter SDK constraints."
+          exit 1
+        fi