ci: replace GitHub Pages action with Gitea Actions for Vercel deployment

Switch from GitHub Pages deployments to Vercel via Gitea Actions CLI.

.gitea/workflows/deploy.yml

@@ -0,0 +1,32 @@
+name: Deploy to Vercel
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install pnpm
+        run: npm install -g pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build
+        run: pnpm build
+
+      - name: Deploy to Vercel
+        run: npx vercel deploy --prod --yes --token ${{ secrets.VERCEL_TOKEN }}
+        env:
+          VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}
+          VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}

.github/workflows/deploy.yml

@@ -1,49 +0,0 @@
-name: Deploy to GitHub Pages
-
-# This action is used to deploy site to GitHub Pages.
-
-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: pnpm/action-setup@v4
-        with:
-          version: latest
-
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 22
-          cache: pnpm
-
-      - run: pnpm install --frozen-lockfile
-
-      - run: pnpm build
-
-      - uses: actions/upload-pages-artifact@v3
-        with:
-          path: doc_build
-
-  deploy:
-    needs: build
-    runs-on: ubuntu-latest
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    steps:
-      - uses: actions/deploy-pages@v4

vercel.json

@@ -1,4 +1,5 @@
 {
+  "outputDirectory": "doc_build",
   "redirects": [
     {
       "source": "/:path(.*)",