Add release workflow and changelog for community plugin submission

.github/workflows/release.yml

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+name: Release Obsidian plugin
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '18'
+
+      - name: Build plugin
+        run: |
+          npm install
+          npm run build
+
+      - name: Create release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          tag="${GITHUB_REF#refs/tags/}"
+
+          gh release create "$tag" \
+            --title="$tag" \
+            --draft \
+            main.js manifest.json styles.css

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0] - 2024-12-19
+
+### Added
+
+- Initial release of Git Sync plugin
+- Git synchronization with GitHub repositories
+- Support for folder-specific sync (not entire repository)
+- Image upload to cloud storage services:
+  - Aliyun OSS
+  - Tencent COS
+  - AWS S3
+  - Cloudflare R2
+- Bilingual support (Chinese/English)
+- Mobile device support
+- Smart file caching system
+- Real-time status display in status bar
+- Configurable image processing with toggle switch
+- Local image storage option
+- Responsive settings interface
+- Command palette integration
+- Right-click context menu support
+
+### Features
+
+- **Git Sync**: Bidirectional synchronization with GitHub
+- **Image Processing**: Paste images and automatically upload to cloud storage
+- **Internationalization**: Full Chinese and English support
+- **Mobile Support**: Works on both desktop and mobile devices
+- **Performance**: Smart caching reduces API calls
+- **User Experience**: Modern interface with real-time feedback
+
+### Technical
+
+- TypeScript implementation
+- ESBuild for fast compilation
+- Comprehensive error handling
+- Plugin settings persistence
+- Hot reload development support