Restructure project

* use modules instead of source sets
* Kotlin JVM instead of multiplatform (for now) to make things simpler
* Warning: GameCell doesn't use mutableState anymore, this needs to be
           fixed for the UI to work!

commonUI/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    alias(libs.plugins.kotlin.jvm)
+    alias(libs.plugins.jetbrainsKotlinCompose)
+    alias(libs.plugins.jetbrainsCompose)
+}
+
+kotlin {
+    jvmToolchain(11)
+
+    dependencies {
+        implementation(compose.components.resources)
+        implementation(compose.runtime)
+        implementation(compose.foundation)
+        implementation(compose.material3)
+        implementation(compose.ui)
+        implementation(compose.components.resources)
+        implementation(compose.components.uiToolingPreview)
+//        implementation(libs.compose.ui.text.googlefonts)
+        implementation(projects.domain)
+
+        testImplementation(libs.kotlin.test)
+        testImplementation(libs.atrium)
+    }
+}
+
+compose.resources {
+    publicResClass = true
+}