Add new Kotlin Multiplatform project to gui.

gui/shared/test@jvm/PlatformJvmTest.kt

@@ -0,0 +1,11 @@
+package com.hyperling.weather
+
+import kotlin.test.Test
+import kotlin.test.assertTrue
+
+class PlatformJvmTest {
+    @Test
+    fun `platform name is reported`() {
+        assertTrue(getPlatform().name.isNotBlank())
+    }
+}