ci(nrg): generate README.md and README.zh_CN.md from a single template

.github/workflows/nrg.yml

@@ -0,0 +1,53 @@
+name: Regenerate READMEs
+on:
+  push:
+    branches: [master]
+    paths:
+      - 'README.src.md'
+      - '.github/workflows/nrg.yml'
+  pull_request:
+    paths:
+      - 'README.src.md'
+      - 'README.md'
+      - 'README.zh_CN.md'
+      - '.github/workflows/nrg.yml'
+permissions:
+  contents: read
+jobs:
+  regenerate:
+    if: github.event_name == 'push'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: nanolaba/nrg-action@9fae0216ed0c828f520e555912776ca624d84fb5  # v1
+        with:
+          file: README.src.md
+          nrg-version: '1.2'
+      - name: Commit regenerated READMEs
+        run: |
+          paths=("README.md" "README.zh_CN.md")
+          status="$(git status --porcelain -- "${paths[@]}")"
+          if [ -n "$status" ]; then
+            changed=$(printf '%s\n' "$status" | sed 's/^...//' | sed 's/^/  - /')
+            git config user.name "github-actions[bot]"
+            git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+            git add -A -- "${paths[@]}"
+            git commit -m "docs: regenerate READMEs from README.src.md" \
+              -m $'Files updated:\n'"$changed"
+            git push
+          fi
+
+  drift-check:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: nanolaba/nrg-action@9fae0216ed0c828f520e555912776ca624d84fb5  # v1
+        with:
+          file: README.src.md
+          mode: check
+          nrg-version: '1.2'

README.md

@@ -1,3 +1,6 @@
+<!-- This file was automatically generated by Nanolaba Readme Generator (NRG) 1.2 -->
+<!-- Visit https://github.com/nanolaba/readme-generator for details -->
+
 Table of Contents ([中文说明](./README.zh_CN.md))
 =================