[KPM] Implement initial IdeaKotlinProjectModelBuilder

- Introduce `kotlin-gradle-plugin-idea` module that allows
to share models between the IDE and KGP

- Add `kotlin-gradle-plugin-idea` to the RuntimePublicAPITest to
ensure binary compatibility

^KT-51262

libraries/tools/binary-compatibility-validator/src/test/kotlin/org.jetbrains.kotlin.tools.tests/RuntimePublicAPITest.kt

@@ -33,6 +33,10 @@ class RuntimePublicAPITest {
         snapshotAPIAndCompare("../../reflect/api/build/libs", "kotlin-reflect-api(?!-[-a-z]+)", nonPublicPackages = listOf("kotlin.reflect.jvm.internal"))
     }
 
+    @Test fun kotlinGradlePluginIdea() {
+        snapshotAPIAndCompare("../kotlin-gradle-plugin-idea/build/libs", "kotlin-gradle-plugin-idea(?!-[-a-z]+)")
+    }
+
     private fun snapshotAPIAndCompare(
         basePath: String,
         jarPattern: String,