feat(minecraft): Support down to Minecraft 1.16.5 and related fixes

conventions/src/main/kotlin/de.siphalor.tweed5.minecraft.mod.dummy.gradle.kts

@@ -4,6 +4,55 @@ plugins {
 	id("de.siphalor.tweed5.minecraft.mod.base")
 }
 
+val processMinecraftModResources = tasks.register<Sync>("processMinecraftModResources") {
+	inputs.property("id", project.name)
+	inputs.property("version", project.version)
+	inputs.property("name", properties["module.name"])
+	inputs.property("description", properties["module.description"])
+	inputs.property("repoUrl", properties["git.url"])
+
+	from(project.layout.settingsDirectory.dir("../tweed5-minecraft/mod-template/resources"))
+	expand(mapOf(
+		"id" to project.name.replace('-', '_'),
+		"version" to project.version,
+		"name" to properties["module.name"],
+		"description" to properties["module.description"],
+		"repoUrl" to properties["git.url"],
+	))
+	into(project.layout.buildDirectory.dir("minecraftModResources"))
+}
+
+val minecraftModJar = tasks.register<Jar>("minecraftModJar") {
+	group = LifecycleBasePlugin.BUILD_GROUP
+
+	dependsOn(tasks.shadowJar)
+	dependsOn(processMinecraftModResources)
+
+	from(zipTree(tasks.shadowJar.get().archiveFile))
+	from(project.layout.buildDirectory.dir("minecraftModResources"))
+
+	destinationDirectory.set(layout.buildDirectory.dir("minecraftModLibs"))
+}
+tasks.assemble {
+	dependsOn(minecraftModJar)
+}
+
+val minecraftModSourcesJar = tasks.register<Jar>("minecraftModSourcesJar") {
+	group = LifecycleBasePlugin.BUILD_GROUP
+
+	dependsOn(processMinecraftModResources)
+
+	from(zipTree(tasks.named<Jar>("sourcesJar").get().archiveFile))
+	from(project.layout.buildDirectory.dir("minecraftModResources"))
+
+	archiveClassifier = "sources"
+	destinationDirectory.set(layout.buildDirectory.dir("minecraftModLibs"))
+}
+
+artifacts.add("minecraftModElements", minecraftModJar)
+artifacts.add("minecraftModApiElements", minecraftModJar)
+artifacts.add("minecraftModSourcesElements", minecraftModSourcesJar)
+
 publishing {
 	publications {
 		create<MavenPublication>("minecraftMod") {