chore: merge the 2016 and 2017 lookups into one repository and one Pages site

Each year keeps its full pipeline under its directory; vite bases move to
/thptqg/<year>/ (2017 keeps its old and old2 generations), one deploy
workflow builds both years' databases and bundles behind a root index.

.github/workflows/deploy-pages.yml

@@ -0,0 +1,91 @@
+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
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+
+      - uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: |
+            2016/tools/xlsxread
+            2017/tools/xlsxread
+
+      - uses: pnpm/action-setup@v4
+        with:
+          package_json_file: 2017/package.json
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+          cache: 'pnpm'
+          cache-dependency-path: |
+            2016/pnpm-lock.yaml
+            2017/pnpm-lock.yaml
+
+      - name: Build 2016 site
+        working-directory: '2016'
+        run: |
+          set -euo pipefail
+          cargo build --release --manifest-path tools/xlsxread/Cargo.toml
+          ./tools/xlsxread/target/release/xlsxread build \
+            --schema tools/xlsxread/configs/thptqg2016-data.toml \
+            --input data --output public/thptqg2016.db
+          pnpm install --frozen-lockfile
+          gzip -k -9 public/thptqg2016.db
+          pnpm build
+          rm -f dist/thptqg2016.db
+
+      - name: Build 2017 site variants
+        working-directory: '2017'
+        run: |
+          set -euo pipefail
+          cargo build --release --manifest-path tools/xlsxread/Cargo.toml
+          ./tools/xlsxread/target/release/xlsxread build --schema tools/xlsxread/configs/thptqg2017-data.toml --input data --output public/thptqg2017.db
+          ./tools/xlsxread/target/release/xlsxread build --schema tools/xlsxread/configs/thptqg2017-data-old.toml --input data-old --output public-old/thptqg2017.db
+          ./tools/xlsxread/target/release/xlsxread build --schema tools/xlsxread/configs/thptqg2017-data-old2.toml --input data-old2 --output public-old2/thptqg2017.db
+          pnpm install --frozen-lockfile
+          gzip -kf -9 public/thptqg2017.db
+          gzip -kf -9 public-old/thptqg2017.db
+          gzip -kf -9 public-old2/thptqg2017.db
+          pnpm build:all
+          rm -f dist/thptqg2017.db dist/old/thptqg2017.db dist/old2/thptqg2017.db
+
+      - name: Assemble site
+        run: |
+          set -euo pipefail
+          mkdir -p _site
+          cp index.html _site/
+          cp -r 2016/dist _site/2016
+          cp -r 2017/dist _site/2017
+
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: _site
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - id: deployment
+        uses: actions/deploy-pages@v4