docs: VitePress site (EN/zh-CN), GitHub Pages workflow, and README trim

.github/workflows/ci.yml

@@ -15,3 +15,14 @@ jobs:
           go-version: "1.24"
       - run: go vet ./...
       - run: go test ./...
+
+  docs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: npm
+      - run: npm ci
+      - run: npm run docs:build

.github/workflows/docs.yml

@@ -0,0 +1,40 @@
+name: docs
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: npm
+      - run: npm ci
+      - run: npm run docs:build
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs/.vitepress/dist
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

@@ -1,2 +1,5 @@
 /dist/
 /onessh
+node_modules/
+docs/.vitepress/cache
+docs/.vitepress/dist