Rename app package to solutions.tretter.esunandroid

- Update Gradle namespace + applicationId
- Move Kotlin sources + tests to new package path
- Update package declarations across app
- Build debug APK v17

app/build.gradle.kts

@@ -5,15 +5,15 @@ plugins {
 }
 
 android {
-    namespace = "com.esun"
+    namespace = "solutions.tretter.esunandroid"
     compileSdk = 35
 
     defaultConfig {
-        applicationId = "com.esun"
+        applicationId = "solutions.tretter.esunandroid"
         minSdk = 26
         targetSdk = 35
-        versionCode = 16
-        versionName = "16"
+        versionCode = 17
+        versionName = "17"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true