Fix the java software component not working with Loom and fix #200 (#460)

* Add modCompileOnlyApi, modRuntimeOnly; deprecate modRuntime

* begin

* continue

* Make RemapSourcesJarTask use properties

* finish

* Remove cursed version hack 😉

* Finish for real

* Add missing header

* Clarify a comment

* Fix tests

* Use Gradle's own *Elements and remove -dev jars

* Fix maven test

* Put mappingsFinal onto runtimeClasspath instead of implementation

* Make non-mod dependencies work with the legacy pom magic too

* Be a bit more clever when removing dev artifacts

src/main/java/net/fabricmc/loom/api/LoomGradleExtensionAPI.java

@@ -174,4 +174,14 @@ public interface LoomGradleExtensionAPI {
 		getDeprecationHelper().replaceWithInLoom0_11("customManifest", "customMinecraftManifest");
 		return getCustomMinecraftManifest().getOrNull();
 	}
+
+	/**
+	 * If true, Loom will replace the {@code -dev} jars in the {@code *Elements} configurations
+	 * with remapped outgoing variants.
+	 *
+	 * <p>Will only apply if {@link #getRemapArchives()} is also true.
+	 *
+	 * @return the property controlling the setup of remapped variants
+	 */
+	Property<Boolean> getSetupRemappedVariants();
 }