Add Caclulate (a mental calculation trainer)

metadata/com.rechnen.app.yml

@@ -0,0 +1,23 @@
+Categories:
+  - Games
+License: GPL-3.0-only
+SourceCode: https://codeberg.org/jonas-l/rechnen-android
+IssueTracker: https://codeberg.org/jonas-l/rechnen-android/issues
+
+AutoName: Calculate
+
+RepoType: git
+Repo: https://codeberg.org/jonas-l/rechnen-android.git
+
+Builds:
+  - versionName: '1.1'
+    versionCode: 2
+    commit: release-1.1
+    subdir: app
+    gradle:
+      - yes
+
+AutoUpdateMode: Version release-%v
+UpdateCheckMode: Tags
+CurrentVersion: '1.1'
+CurrentVersionCode: 2