Initialize Compose Multiplatform project with AGP 9

Set up two-module structure for AGP 9 compatibility:
- composeApp: KMP shared library (com.android.kotlin.multiplatform.library)
- androidApp: Thin Android app shell (com.android.application)

Configure all dependencies in version catalog: CMP 1.11.0, Kotlin 2.3.21,
Ktor 3.4.3, Room 2.8.4, Coil 3.4.0, kotlinx-serialization/datetime/coroutines,
AndroidX Navigation 2.9.2, Lifecycle 2.10.0, DataStore 1.2.1, WorkManager 2.11.1.

Co-Authored-By: Claude Opus 4.6 (1M context)

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>

gradle.properties

@@ -0,0 +1,9 @@
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+kotlin.code.style=official
+
+# Compose Multiplatform
+org.jetbrains.compose.experimental.uikit.enabled=true
+
+# Android
+android.useAndroidX=true
+android.nonTransitiveRClass=true