feat(loldle): port classic-mode game from loldle repo

Adds loldle module with classic-mode champion guessing. Ports comparison
logic from tiennm99/loldle (lib/classic-mode.js) and bundles champion
data from tiennm99/loldle-data. Adds GH Actions workflow that re-syncs
champions.json on cross-repo dispatch from loldle-data.

- Three public commands: /loldle, /loldle_giveup, /loldle_stats
- Per-user daily state + streak stats in KV (3-day TTL on games)
- champions-data.js wrapper sidesteps Node 24 / esbuild disagreement on
  JSON import attributes; generator script + npm run build:loldle-data
- register script now tolerates missing .env.deploy (env-file-if-exists)
  so Workers Builds can inject env vars directly
- fix(scripts): escape stray */ in migrate.js docstring that broke node
- 16 new unit tests (compare, daily, lookup); dispatcher test updated
  for the new command set

.github/workflows/sync-loldle-data.yml

@@ -0,0 +1,50 @@
+name: Sync loldle data
+
+on:
+  repository_dispatch:
+    types: [loldle-data-updated]
+  workflow_dispatch:
+  schedule:
+    # Safety net: runs Friday 07:00 UTC (~25h after loldle-data's Thursday job)
+    # in case the dispatch event was missed.
+    - cron: "0 7 * * 5"
+
+permissions:
+  contents: write
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Download latest champions.json
+        run: |
+          curl -fsSL -o src/modules/loldle/champions.json.new \
+            https://raw.githubusercontent.com/tiennm99/loldle-data/main/champions.json
+
+      - name: Compare and replace
+        id: diff
+        run: |
+          if cmp -s src/modules/loldle/champions.json src/modules/loldle/champions.json.new; then
+            echo "No changes."
+            rm src/modules/loldle/champions.json.new
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+          else
+            mv src/modules/loldle/champions.json.new src/modules/loldle/champions.json
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Regenerate champions-data.js
+        if: steps.diff.outputs.changed == 'true'
+        run: node scripts/build-loldle-data.js
+
+      - name: Commit and push
+        if: steps.diff.outputs.changed == 'true'
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add src/modules/loldle/champions.json src/modules/loldle/champions-data.js
+          git commit -m "chore(loldle): sync champions.json from loldle-data"
+          git push