ci: 添加自动化工具提升项目质量

.github/workflows/commitlint.yml

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+name: Commit Lint
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: read
+
+jobs:
+  commitlint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          cache: 'npm'
+
+      - name: Install commitlint
+        run: |
+          npm install --save-dev @commitlint/config-conventional @commitlint/cli
+
+      - name: Validate PR commits
+        run: npx commitlint --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose

.github/workflows/pr-size-labeler.yml

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+name: PR Size Labeler
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  size-label:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Label PR by size
+        uses: codelytv/pr-size-labeler@v1
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          xs_label: 'size/XS'
+          xs_max_size: '10'
+          s_label: 'size/S'
+          s_max_size: '100'
+          m_label: 'size/M'
+          m_max_size: '500'
+          l_label: 'size/L'
+          l_max_size: '1000'
+          xl_label: 'size/XL'
+          message_if_xl: |
+            这个 PR 改动较大（超过 1000 行），建议拆分成多个小 PR 以便 Review。
+
+            This PR is quite large (over 1000 lines). Consider splitting it into smaller PRs for easier review.

.github/workflows/size-limit.yml

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+name: Size Limit
+
+on:
+  pull_request:
+    branches:
+      - master
+      - main
+    paths:
+      - 'packages/core/src/**'
+      - 'packages/core/package.json'
+      - '.size-limit.json'
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+
+jobs:
+  size:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build core package
+        run: |
+          cd packages/core
+          npm run build:npm
+
+      - name: Check bundle size
+        uses: andresz1/size-limit-action@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          skip_step: install

.github/workflows/stale.yml

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+name: Stale Issues and PRs
+
+on:
+  schedule:
+    - cron: '0 0 * * *'  # 每天运行一次
+  workflow_dispatch:  # 允许手动触发
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Stale Bot
+        uses: actions/stale@v9
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+          # Issue 配置
+          stale-issue-message: |
+            这个 issue 已经 60 天没有活动了，将在 14 天后自动关闭。
+            如果这个问题仍然存在，请留言说明情况。
+
+            This issue has been inactive for 60 days and will be closed in 14 days.
+            If this issue is still relevant, please leave a comment.
+          close-issue-message: |
+            由于长时间无活动，这个 issue 已被自动关闭。
+            如需重新打开，请留言说明。
+
+            This issue has been automatically closed due to inactivity.
+            Please comment if you'd like to reopen it.
+          days-before-issue-stale: 60
+          days-before-issue-close: 14
+          stale-issue-label: 'stale'
+          exempt-issue-labels: 'pinned,security,enhancement,help wanted'
+
+          # PR 配置
+          stale-pr-message: |
+            这个 PR 已经 30 天没有活动了，将在 7 天后自动关闭。
+            如果你还在处理这个 PR，请更新一下。
+
+            This PR has been inactive for 30 days and will be closed in 7 days.
+            If you're still working on it, please update it.
+          close-pr-message: |
+            由于长时间无活动，这个 PR 已被自动关闭。
+            如需继续，请重新打开或创建新的 PR。
+
+            This PR has been automatically closed due to inactivity.
+            Please reopen or create a new PR to continue.
+          days-before-pr-stale: 30
+          days-before-pr-close: 7
+          stale-pr-label: 'stale'
+          exempt-pr-labels: 'pinned,security,wip'
+
+          # 其他配置
+          operations-per-run: 100
+          remove-stale-when-updated: true
+          ascending: true

.github/workflows/welcome.yml

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+name: Welcome
+
+on:
+  issues:
+    types: [opened]
+  pull_request_target:
+    types: [opened]
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  welcome:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Welcome new contributors
+        uses: actions/first-interaction@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: |
+            👋 你好！感谢你提交第一个 issue！
+
+            我们会尽快查看并回复。同时，建议你：
+            - 📚 查看[文档](https://esengine.github.io/ecs-framework/)
+            - 🤖 使用 [AI 文档助手](https://deepwiki.com/esengine/ecs-framework)
+            - 💬 加入 [QQ 交流群](https://jq.qq.com/?_wv=1027&k=29w1Nud6)
+
+            ---
+
+            👋 Hello! Thanks for opening your first issue!
+
+            We'll review it as soon as possible. Meanwhile, you might want to:
+            - 📚 Check the [documentation](https://esengine.github.io/ecs-framework/)
+            - 🤖 Use [AI documentation assistant](https://deepwiki.com/esengine/ecs-framework)
+
+          pr-message: |
+            👋 你好！感谢你提交第一个 Pull Request！
+
+            在我们 Review 之前，请确保：
+            - ✅ 代码遵循项目规范
+            - ✅ 通过所有测试
+            - ✅ 更新了相关文档
+            - ✅ Commit 遵循 [Conventional Commits](https://www.conventionalcommits.org/) 规范
+
+            查看完整的[贡献指南](https://github.com/esengine/ecs-framework/blob/master/CONTRIBUTING.md)。
+
+            ---
+
+            👋 Hello! Thanks for your first Pull Request!
+
+            Before we review, please ensure:
+            - ✅ Code follows project conventions
+            - ✅ All tests pass
+            - ✅ Documentation is updated
+            - ✅ Commits follow [Conventional Commits](https://www.conventionalcommits.org/)
+
+            See the full [Contributing Guide](https://github.com/esengine/ecs-framework/blob/master/CONTRIBUTING.md).