Release 2.31.0

- Bump app versionName from 2.31.0-beta.42 to 2.31.0 for production release
- Prepare GitHub release and Play publishing workflow for v2.31.0

🤖 Auto-generated

Author: OwenMcGirr

app/build.gradle.kts

@@ -20,7 +20,7 @@ android {
         minSdk = 29
         targetSdk = 36
         versionCode = gitVersionCode()
-        versionName = "2.31.0-beta.42"
+        versionName = "2.31.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {