Fix level setup, reword flow, and catalog scope

- create and enter the level's declared starting directory
- inspect Git state from the repository containing the active directory
- start the init level in /sandbox/git_hug and cover it with a runtime test
- apply edited reword subjects as commit messages in the in-app rebase editor
- cover rename_commit with a native interactive rebase regression test
- remove the upstream contribute call to action from the playable level catalog
- update level parity documentation

app/build.gradle.kts

@@ -19,8 +19,8 @@ android {
         applicationId = "solutions.tretter.githugandroid"
         minSdk = 26
         targetSdk = 35
-        versionCode = 167
-        versionName = "0.1.166"
+        versionCode = 168
+        versionName = "0.1.167"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true