fix: move Main.kt into shared/src/jvmMain, remove broken desktopApp module, add root repositories

build.gradle.kts

@@ -1 +1,8 @@
 // Top-level build file
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+        maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+    }
+}

settings.gradle.kts

@@ -4,4 +4,4 @@ pluginManagement {
     repositories { google(); mavenCentral(); gradlePluginPortal() }
 }
 plugins { id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0" }
-include(":shared", ":desktopApp")
+include(":shared")