feat: v0.2.5 — 内置语法高亮 + exportPDF + benchmark + CI 并行

- 新增 src/highlight.ts 零依赖轻量高亮器：13 种语言，先转义后
  着色保证安全，输出 me-hl-* 类，MeEditor.highlight 即插即用
- exportTool 新增 editor.exportPDF()（隐藏 iframe + window.print），
  exportHTML/exportPDF 共用 HTML 构建逻辑
- imagePaste 支持 maxSizeKB 限制，超限 toast 警告
- npm run bench 性能基准：parseMarkdown 1MB ≈ 51ms
- CI 测试拆分为 parser/core/rest 三个并行 job + 跨版本 verify job
- docs.html/README 补齐新 API、事件、高亮文档；取消跟踪 dist 产物；
  版本 0.2.4 → 0.2.5，测试 725 → 768

.gitea/workflows/ci.yml

@@ -7,37 +7,76 @@ on:
     branches: [master]
 
 jobs:
-  test:
+  test-parser:
     runs-on: debian-latest
     timeout-minutes: 15
-
-    strategy:
-      matrix:
-        node-version: [18.x, 20.x, 22.x, 24.x]
-
     steps:
       - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22.x
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci
+      - name: Run parser tests
+        run: npx jest tests/parser.test.ts tests/highlight.test.ts --forceExit --maxWorkers=1 --testTimeout=15000
+        env:
+          NODE_OPTIONS: --max-old-space-size=4096
 
+  test-core:
+    runs-on: debian-latest
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22.x
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci
+      - name: Run core tests
+        run: npx jest tests/core.test.ts tests/plugins.test.ts tests/index.test.ts --forceExit --maxWorkers=1 --testTimeout=15000
+        env:
+          NODE_OPTIONS: --max-old-space-size=4096
+
+  test-rest:
+    runs-on: debian-latest
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22.x
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci
+      - name: Run remaining tests
+        run: npx jest tests/themes.test.ts tests/i18n.test.ts tests/utils.test.ts tests/animations.test.ts tests/styles.test.ts --forceExit --maxWorkers=1 --testTimeout=15000
+        env:
+          NODE_OPTIONS: --max-old-space-size=4096
+
+  verify:
+    runs-on: debian-latest
+    timeout-minutes: 15
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x, 24.x]
+    steps:
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
           cache: 'npm'
-
       - name: Install dependencies
         run: npm ci
-
       - name: Type check
         run: npm run typecheck
-
       - name: Lint
         run: npm run lint
         continue-on-error: true
-
-      - name: Run tests
-        run: npx jest --forceExit --maxWorkers=1 --testTimeout=15000
-        env:
-          NODE_OPTIONS: --max-old-space-size=4096
-
       - name: Build
         run: npm run build