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>

settings.gradle.kts

@@ -0,0 +1,18 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "NodeCast"
+include(":app")