Bootstrap KwabaTV Gradle project, minimal WebView shell

Gradle wrapper pinned to 8.7, AGP 8.5.2, compileSdk 34/minSdk 21/
targetSdk 34 - the tested combination from the original app.
MainActivity is a placeholder that just loads BuildConfig.WEBSITE_URL
(the new /tv room-list route); the real key-mapping logic is a
separate follow-up commit.

Note for future builds on this machine: Android Studio's bundled JBR
is JDK 25, which Gradle 8.7 cannot run on at all (crashes at startup
with a bare version-string error). Built and verified with a
separately-installed Temurin JDK 21 instead
(C:\Users\GGB\jdks\jdk-21.0.12.1+1) - set JAVA_HOME to that for any
Gradle command in this repo, not the Android Studio JBR.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LHgWjmEJXsJEi1EVAoTp4K

app/build.gradle.kts

@@ -0,0 +1,37 @@
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "de.ggb.kwabatv"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "de.ggb.kwabatv"
+        minSdk = 21
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+        buildConfigField("String", "WEBSITE_URL", "\"https://kwaba.whodovoodoo.pasteaf.de/tv\"")
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+        }
+    }
+
+    buildFeatures {
+        buildConfig = true
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}