Bootstrap Castarr from NodeCast prototype

Imported the native TV app (Kotlin, ExoPlayer, embedded remote server, QR
pairing) plus CONTEXT.md and ADRs 0001-0005. Rename, Compose for TV UI and
the Dispatcharr integration follow as tracked issues.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/build.gradle.kts

@@ -0,0 +1,51 @@
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "com.nodecast.tv"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "com.nodecast.tv"
+        minSdk = 23
+        targetSdk = 35
+        versionCode = 1
+        versionName = "1.0.0"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = true
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = "17"
+        allWarningsAsErrors = true
+    }
+
+    lint {
+        // Media3's UI classes are @UnstableApi; the opt-in lint check would
+        // otherwise fail release builds.
+        disable += "UnsafeOptInUsageError"
+    }
+}
+
+dependencies {
+    implementation("androidx.core:core-ktx:1.15.0")
+    implementation("androidx.media3:media3-exoplayer:1.4.1")
+    implementation("androidx.media3:media3-exoplayer-hls:1.4.1")
+    implementation("androidx.media3:media3-ui:1.4.1")
+    implementation("androidx.media3:media3-session:1.4.1")
+    implementation("org.nanohttpd:nanohttpd:2.3.1")
+    implementation("org.nanohttpd:nanohttpd-websocket:2.3.1")
+    implementation("com.google.zxing:core:3.5.3")
+}