feat(flutter): add workflow_dispatch and tag creation logic

- Add workflow_dispatch trigger for manual version input
- Add conditional tag creation after version update
- Ensure tag is created on commit with updated pubspec.yaml
- Fix pub.dev version mismatch issue

Author: chilensis

.github/workflows/release-flutter.yml

@@ -1,6 +1,12 @@
 name: Release Flutter Platform
 
 on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "Version to release (e.g., 0.1.46)"
+        required: true
+        type: string
   push:
     tags:
       - "*"
@@ -44,7 +50,11 @@ jobs:
       - name: Get version
         id: get_version
         run: |
-          VERSION=${GITHUB_REF#refs/tags/}
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            VERSION="${{ github.event.inputs.version }}"
+          else
+            VERSION=${GITHUB_REF#refs/tags/}
+          fi
           echo "version=$VERSION" >> $GITHUB_OUTPUT
           echo "Version: $VERSION"