chore: add dependabot (#6369)

.github/dependabot.yml

@@ -0,0 +1,86 @@
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    open-pull-requests-limit: 7
+    target-branch: "main"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    groups:
+      # 核心框架
+      core-framework:
+        patterns:
+          - "react"
+          - "react-dom"
+          - "electron"
+          - "typescript"
+          - "@types/react*"
+          - "@types/node"
+        update-types:
+          - "minor"
+          - "patch"
+
+      # Electron 生态和构建工具
+      electron-build:
+        patterns:
+          - "electron-*"
+          - "@electron*"
+          - "vite"
+          - "@vitejs/*"
+          - "dotenv-cli"
+          - "rollup-plugin-*"
+          - "@swc/*"
+        update-types:
+          - "minor"
+          - "patch"
+
+      # 测试工具
+      testing-tools:
+        patterns:
+          - "vitest"
+          - "@vitest/*"
+          - "playwright"
+          - "@playwright/*"
+          - "eslint*"
+          - "@eslint*"
+          - "prettier"
+          - "husky"
+          - "lint-staged"
+        update-types:
+          - "minor"
+          - "patch"
+
+      # CherryStudio 自定义包
+      cherrystudio-packages:
+        patterns:
+          - "@cherrystudio/*"
+        update-types:
+          - "minor"
+          - "patch"
+
+      # 兜底其他 dependencies
+      other-dependencies:
+        dependency-type: "production"
+
+      # 兜底其他 devDependencies
+      other-dev-dependencies:
+        dependency-type: "development"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 3
+    commit-message:
+      prefix: "ci"
+      include: "scope"
+    groups:
+      github-actions:
+        patterns:
+          - "*"
+        update-types:
+          - "minor"
+          - "patch"