chore: add GitHub Actions release workflow, MIT license, and update gitignore

.github/workflows/release.yml

@@ -0,0 +1,53 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*' # 当推送标签形如 v1.0.0 时触发自动构建
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: Build & Release
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.21'
+          cache: true
+
+      - name: Download Dependencies
+        run: go mod download
+
+      - name: Compile Cross-Platform Binaries
+        run: |
+          mkdir -p build_output
+          
+          echo "Building Windows amd64..."
+          GOOS=windows GOARCH=amd64 go build -ldflags="-s -w" -o build_output/smart-monitor_windows_amd64.exe ./cmd/smart-monitor
+          
+          echo "Building Windows arm64..."
+          GOOS=windows GOARCH=arm64 go build -ldflags="-s -w" -o build_output/smart-monitor_windows_arm64.exe ./cmd/smart-monitor
+          
+          echo "Building Linux amd64..."
+          GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -o build_output/smart-monitor_linux_amd64 ./cmd/smart-monitor
+          
+          echo "Building Linux arm64..."
+          GOOS=linux GOARCH=arm64 go build -ldflags="-s -w" -o build_output/smart-monitor_linux_arm64 ./cmd/smart-monitor
+
+      - name: Publish GitHub Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: build_output/*
+          draft: false
+          prerelease: false
+          generate_release_notes: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}