[KPM] Implement IdeaKotlinVariant

KT-51262
KT-51220

libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinCompilationOutput.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.gradle.kpm.idea
+
+import java.io.File
+import java.io.Serializable
+
+interface IdeaKotlinCompilationOutput : Serializable {
+    val classesDirs: Set<File>
+    val resourcesDir: File?
+}
+
+@InternalKotlinGradlePluginApi
+data class IdeaKotlinCompilationOutputImpl(
+    override val classesDirs: Set<File>,
+    override val resourcesDir: File?
+) : IdeaKotlinCompilationOutput

libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinModule.kt

@@ -9,13 +9,13 @@ import java.io.Serializable
 
 interface IdeaKotlinModule : Serializable {
     val moduleIdentifier: IdeaKotlinModuleIdentifier
-    val fragments: Collection<IdeaKotlinFragment>
-}
+    val fragments: List<IdeaKotlinFragment>
+} 
 
 @InternalKotlinGradlePluginApi
 data class IdeaKotlinModuleImpl(
     override val moduleIdentifier: IdeaKotlinModuleIdentifier,
-    override val fragments: Collection<IdeaKotlinFragment>
+    override val fragments: List<IdeaKotlinFragment>
 ) : IdeaKotlinModule {
 
     @InternalKotlinGradlePluginApi

libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/kpm/idea/IdeaKotlinVariant.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.gradle.kpm.idea
+
+import java.io.Serializable
+
+interface IdeaKotlinVariant : IdeaKotlinFragment, Serializable {
+    val variantAttributes: Map<String, String>
+    val compilationOutputs: IdeaKotlinCompilationOutput
+}
+
+@InternalKotlinGradlePluginApi
+data class IdeaKotlinVariantImpl(
+    internal val fragment: IdeaKotlinFragment,
+    override val variantAttributes: Map<String, String>,
+    override val compilationOutputs: IdeaKotlinCompilationOutput,
+) : IdeaKotlinVariant, IdeaKotlinFragment by fragment