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/ci.yml

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+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check:
+    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 test
+
+      - run: pnpm lint
+
+      # No BASE_PATH here: this checks that the app compiles. The base-path
+      # behaviour is verified against a real preview before release.
+      - run: pnpm build
+
+  scraper:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: actions/setup-go@v6
+        with:
+          go-version-file: data/go.mod
+
+      - run: go build ./... && go test ./...
+        working-directory: data

.github/workflows/deploy.yml

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+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

.github/workflows/update-champions.yml

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+name: Update champions data
+
+on:
+  schedule:
+    # Every Thursday at 06:00 UTC (day after Riot's Wednesday patch)
+    - cron: "0 6 * * 4"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  actions: write
+
+concurrency:
+  group: update-champions
+  cancel-in-progress: false
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7
+
+      - name: Set up Go
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: data/go.mod
+
+      - name: Run scraper
+        run: go run .
+        working-directory: data
+
+      - name: Copy data into the web app
+        run: cp data/champions.json web/static/champions.json
+
+      - name: Commit and push if changed
+        id: commit
+        run: |
+          set -euo pipefail
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add data/champions.json data/CHAMPIONS.md web/static/champions.json
+          if git diff --cached --quiet; then
+            echo "No changes to commit"
+            exit 0
+          fi
+          git commit -m "chore(data): update champions data to latest patch"
+          git push
+          echo "changed=true" >> "$GITHUB_OUTPUT"
+
+      # A push made with GITHUB_TOKEN does not trigger other workflows,
+      # so the Pages deploy has to be started explicitly.
+      - name: Trigger deploy
+        if: steps.commit.outputs.changed == 'true'
+        run: gh workflow run deploy.yml --ref main
+        env:
+          GH_TOKEN: ${{ github.token }}