Initial commit: Kotlin Multiplatform project setup

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Co-Authored-By: Claude <noreply@anthropic.com>

composeApp/src/jsMain/kotlin/com/example/mycrib/Platform.js.kt

@@ -0,0 +1,7 @@
+package com.example.mycrib
+
+class JsPlatform: Platform {
+    override val name: String = "Web with Kotlin/JS"
+}
+
+actual fun getPlatform(): Platform = JsPlatform()

composeApp/src/jsMain/kotlin/com/example/mycrib/network/ApiClient.js.kt

@@ -0,0 +1,3 @@
+package com.mycrib.shared.network
+
+actual fun getLocalhostAddress(): String = "127.0.0.1"