Add basic support for Android

- Add Android build scripts
- Add Android GUI and `MainActivity`
- Fix Java records
- Fix `Path.of` errors
- Update Main and MainActivity to match better

gradle.properties

@@ -8,3 +8,7 @@ org.gradle.jvmargs=--add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAME
 kotlin.code.style=official
 # https://github.com/Kotlin/kotlinx-atomicfu#atomicfu-compiler-plugin
 kotlinx.atomicfu.enableJvmIrTransformation=true
+
+android.useAndroidX=true
+android.nonTransitiveRClass=true
+org.gradle.unsafe.configuration-cache=true