feat: 跨平台发布打包，支持 7 个目标平台交叉编译和 tar.gz 分发

- 新增 scripts/release.ts，支持 7 个编译目标（linux/darwin/windows + musl 变体）
- 从 build.ts 提取共享构建逻辑到 build-common.ts，现有 build 行为不变
- 使用 tar-stream + node:zlib 创建 tar.gz，精确控制 Unix 权限位
- SHA256 校验和文件格式兼容 sha256sum -c
- 支持 --target 参数选择特定平台编译
- 新增 devDependency: tar-stream、@types/tar-stream
- 更新 README.md 和 DEVELOPMENT.md 文档
- 同步 openspec specs

package.json

@@ -16,6 +16,7 @@
     "verify": "bun run check && bun run build",
     "test": "bun test",
     "clean": "bun run scripts/clean.ts",
+    "release": "bun run scripts/release.ts",
     "typecheck": "tsc --noEmit",
     "prepare": "husky",
     "version:patch": "bun run scripts/bump-version.ts patch",
@@ -33,6 +34,7 @@
     "@types/jsdom": "^28.0.3",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "@types/tar-stream": "^3.1.4",
     "@vitejs/plugin-react": "^6.0.2",
     "eslint": "^10.3.0",
     "eslint-config-prettier": "^10.1.8",
@@ -46,6 +48,7 @@
     "jsdom": "^29.1.1",
     "lint-staged": "^17.0.4",
     "prettier": "^3.8.3",
+    "tar-stream": "^3.2.0",
     "typescript": "^6.0.3",
     "typescript-eslint": "^8.59.3",
     "vite": "^8.0.13"