chore: wire up monorepo layout after absorbing loldle-data and loldle-android

Workflows move to the repo root: deploy and CI build from web/, and a single
update-champions workflow replaces the old two-repo pipeline (scrape in data/,
copy into web/static/, redeploy). Go module becomes
github.com/tiennm99/loldle/data. Root README maps the three parts.

.github/workflows/deploy.yml

@@ -0,0 +1,54 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: web
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: pnpm/action-setup@v6
+        with:
+          package_json_file: web/package.json
+
+      - uses: actions/setup-node@v7
+        with:
+          node-version: '24'
+          cache: 'pnpm'
+          cache-dependency-path: web/pnpm-lock.yaml
+
+      - run: pnpm install --frozen-lockfile --ignore-scripts
+
+      - run: pnpm build
+        env:
+          BASE_PATH: /${{ github.event.repository.name }}
+
+      - uses: actions/upload-pages-artifact@v5
+        with:
+          path: web/build
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v5