feat(launcher): Linux play wrapper, patch UX, Gitea sync cleanup

- Play on Linux: use launch.linux_wrapper (wine) or linux_steam_uri; chmod .exe after install
- Windows: retry EBUSY on MPQ replace; download to .new before rename
- After successful sync: remove .bak-* backups; realmlist only Data/enUS (ignore enGB)
- Gitea/distro merge: skip Fractured-Launcher* from GitHub assets (CI default-branch build wins)
- Omit blockmap and builder-debug from staged artifacts and Gitea uploads; upload script validates before clearing attachments
- README and launcher version 1.0.12

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/fractured-launcher-ci.yml

@@ -49,7 +49,6 @@ jobs:
           path: |
             tools/fractured-launcher-electron/dist/*.exe
             tools/fractured-launcher-electron/dist/latest.yml
-            tools/fractured-launcher-electron/dist/*.blockmap
 
   electron-launcher-linux:
     runs-on: ubuntu-latest
@@ -77,5 +76,5 @@ jobs:
           if-no-files-found: warn
           path: |
             tools/fractured-launcher-electron/dist/*.AppImage
-            tools/fractured-launcher-electron/dist/*.yml
-            tools/fractured-launcher-electron/dist/*.blockmap
+            tools/fractured-launcher-electron/dist/latest.yml
+            tools/fractured-launcher-electron/dist/latest-linux.yml