feat: implement separate GitHub Actions workflows for deploying English and Chinese documentation to GitHub Pages

- Added `deploy-docs-en.yml` for English documentation deployment.
- Added `deploy-docs-zh.yml` for Chinese documentation deployment.
- Removed the consolidated `deploy-docs.yml` workflow.

Author: onshinpei

.github/workflows/deploy-docs-en.yml

@@ -0,0 +1,49 @@
+name: Deploy English Docs to gh-pages
+
+on:
+  push:
+    branches: [main, master, feature/opt]
+    paths:
+      - 'nextra-docs-en/**'
+      - '.github/workflows/deploy-docs-en.yml'
+  workflow_dispatch:
+
+# 设置权限
+permissions:
+  contents: write  # 需要写权限以推送到 gh-pages 分支
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # 需要完整历史记录
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: 'nextra-docs-en/package-lock.json'
+
+      - name: Install dependencies
+        run: |
+          cd nextra-docs-en
+          npm ci --force
+
+      - name: Build English docs
+        run: |
+          cd nextra-docs-en
+          npm run build
+
+      - name: Deploy to gh-pages branch (en directory)
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./nextra-docs-en/out
+          publish_branch: gh-pages
+          destination_dir: en
+          keep_files: true  # 保留其他目录的文件（如 zh 目录）
+

.github/workflows/deploy-docs-zh.yml

@@ -0,0 +1,49 @@
+name: Deploy Chinese Docs to gh-pages
+
+on:
+  push:
+    branches: [main, master, feature/opt]
+    paths:
+      - 'nextra-docs-zh/**'
+      - '.github/workflows/deploy-docs-zh.yml'
+  workflow_dispatch:
+
+# 设置权限
+permissions:
+  contents: write  # 需要写权限以推送到 gh-pages 分支
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # 需要完整历史记录
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: 'nextra-docs-zh/package-lock.json'
+
+      - name: Install dependencies
+        run: |
+          cd nextra-docs-zh
+          npm ci --force
+
+      - name: Build Chinese docs
+        run: |
+          cd nextra-docs-zh
+          npm run build
+
+      - name: Deploy to gh-pages branch (zh directory)
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./nextra-docs-zh/out
+          publish_branch: gh-pages
+          destination_dir: zh
+          keep_files: true  # 保留其他目录的文件（如 en 目录）
+