Keep every release build

Three so far, each signed with the same key so any of them upgrades any other
without losing bookmarks: 0.1.0 as it stood last night, 0.2.0 with share and
the assistant, and 0.2.1 with answers in the page.

These are binaries in git history, which is permanent and makes every clone
carry them. Gitea's own releases attach a build to a tag without that cost;
keeping them here is deliberate, so a version can be reinstalled without
finding the commit and rebuilding it. Tags v0.1.0, v0.2.0 and v0.2.1 mark the
commits each was built from, so they stay reproducible either way.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

releases/README.md

@@ -0,0 +1,24 @@
+# Builds
+
+Every release, kept so a version can be reinstalled without rebuilding it. All are signed with
+the same release key, so any of them upgrades any other in place without losing bookmarks.
+
+Each is reproducible: check out the commit and run `./gradlew assembleRelease`. F-Droid builds
+from source and signs with its own key, so these are for direct installation only.
+
+| Version | Code | Commit | What it added |
+| --- | --- | --- | --- |
+| 0.1.0 | 1 | `9445f44` | The base app: browsing, bookmarks, offline, themes, the bundled dictionary with pronunciation, and Ganjoor's chapter order. |
+| 0.2.0 | 2 | `d92445f` | Share a poem, couplet or selection; look a word up from any app's selection menu; the optional AI assistant. |
+| 0.2.1 | 3 | `ec05989` | Assistant answers in the page rather than over it, a visible chevron for each couplet's actions, and answers remembered so scrolling doesn't re-ask. |
+
+## Checksums
+
+```
+76121689da069d6ea2e2c6587d4b371ceb51d21bfe069a583d346d3da970337a  ganjoor-0.1.0.apk
+43d78b773efca2b1aa2bf790c689b3086389d66c4ea0ffb72c9dba8bddb50770  ganjoor-0.2.0.apk
+5163554eb01845c131c31a9da7bdd748170bb9b5f82edaece754b4cf40b02b0c  ganjoor-0.2.1.apk
+```
+
+Installing: `adb install -r releases/ganjoor-<version>.apk`. A phone holding a *debug* build has
+to have it uninstalled first — Android will not replace a debug signature with a release one.