Initial commit: multi-platform emulator with PS1 support

Jetpack Compose app with adaptive layouts (phone/tablet/foldable) using
Window Size Classes. Integrates a C++ libretro frontend via JNI for
actual PS1 emulation using pcsx_rearmed, with AAudio output and
ANativeWindow rendering.

- Emulation core architecture with interface for NES, SNES, N64,
  Genesis, PS1, PS2 (PS1 implemented, others placeholder)
- Touch controller overlay with D-pad (diagonal support), face buttons,
  shoulders, and analog sticks
- Bluetooth/USB controller detection and input mapping
- Customizable controller layout editor with drag-to-reposition
- Game library with auto-scan of /sdcard/Games/ subfolders
- Auto-import of libretro core .so from /sdcard/Games/cores/
- Save states and SRAM persistence

gradle/libs.versions.toml

@@ -0,0 +1,53 @@
+[versions]
+agp = "9.0.1"
+kotlin = "2.1.20"
+coreKtx = "1.16.0"
+junit = "4.13.2"
+junitVersion = "1.3.0"
+espressoCore = "3.7.0"
+appcompat = "1.7.1"
+material = "1.13.0"
+composeBom = "2025.04.01"
+activityCompose = "1.10.1"
+navigationCompose = "2.9.0"
+lifecycle = "2.9.0"
+coroutines = "1.10.2"
+windowSizeClass = "1.3.2"
+datastorePrefs = "1.1.4"
+
+[libraries]
+androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+junit = { group = "junit", name = "junit", version.ref = "junit" }
+androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
+androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
+androidx-appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "appcompat" }
+material = { group = "com.google.android.material", name = "material", version.ref = "material" }
+
+# Compose
+compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
+compose-ui = { group = "androidx.compose.ui", name = "ui" }
+compose-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
+compose-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
+compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
+compose-material3 = { group = "androidx.compose.material3", name = "material3" }
+compose-material-icons = { group = "androidx.compose.material", name = "material-icons-extended" }
+activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
+navigation-compose = { group = "androidx.navigation", name = "navigation-compose", version.ref = "navigationCompose" }
+
+# Lifecycle
+lifecycle-runtime-compose = { group = "androidx.lifecycle", name = "lifecycle-runtime-compose", version.ref = "lifecycle" }
+lifecycle-viewmodel-compose = { group = "androidx.lifecycle", name = "lifecycle-viewmodel-compose", version.ref = "lifecycle" }
+
+# Window Size
+material3-wsc = { group = "androidx.compose.material3", name = "material3-window-size-class", version.ref = "windowSizeClass" }
+
+# Coroutines
+coroutines-android = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-android", version.ref = "coroutines" }
+
+# DataStore
+datastore-prefs = { group = "androidx.datastore", name = "datastore-preferences", version.ref = "datastorePrefs" }
+
+[plugins]
+android-application = { id = "com.android.application", version.ref = "agp" }
+kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+compose-compiler = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }