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.

README.md

@@ -0,0 +1,17 @@
+# loldle
+
+LoLdle-style League of Legends daily champion guessing game — one repository, three parts:
+
+| Directory | What it is |
+| --- | --- |
+| [`web/`](./web/) | The SvelteKit web app, deployed to [tiennm99.github.io/loldle](https://tiennm99.github.io/loldle/) |
+| [`data/`](./data/) | Go scraper that refreshes `champions.json` weekly from Riot's Data Dragon API |
+| [`android/`](./android/) | Android client (stub) |
+
+The `Update champions data` workflow runs the scraper every Thursday, copies the
+result into `web/static/champions.json`, and redeploys the site when the data
+changed.
+
+## License
+
+Apache-2.0 — see [LICENSE](./web/LICENSE).