[Docs] Setup Documentation System and Re-organize Dependencies (#49)

Signed-off-by: SamitHuang <285365963@qq.com>

.github/workflows/docs.yml

@@ -0,0 +1,51 @@
+name: Deploy Documentation
+
+on:
+  push:
+    branches:
+      - main
+      - master
+    paths:
+      - 'docs/**'
+      - 'mkdocs.yml'
+      - 'vllm_omni/**'
+      - '.github/workflows/docs.yml'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pages: write
+  id-token: write
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          pip install -e ".[docs]"
+
+      - name: Build documentation
+        run: mkdocs build
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./site
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4
+