feat: fabric 1.21 support

Author: alazeprt

fabric/1.21/build.gradle.kts

@@ -0,0 +1,38 @@
+import org.gradle.kotlin.dsl.withType
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+dependencies {
+    implementation(project(":fabric:1.20.4"))!!
+}
+
+sourceSets {
+    main {
+        java {
+            srcDir(project(":fabric:1.20.4").sourceSets.main.get().java)
+        }
+        kotlin {
+            srcDir(project(":fabric:1.20.4").sourceSets.main.get().kotlin)
+        }
+        resources {
+            srcDir(project(":fabric:1.20.4").sourceSets.main.get().resources)
+        }
+    }
+}
+
+tasks.withType<KotlinCompile> {
+    kotlinOptions {
+        jvmTarget = "21"
+        freeCompilerArgs = listOf("-Xjvm-default=all")
+    }
+}
+
+tasks.withType<JavaCompile>().configureEach {
+    options.release.set(21)
+}
+
+java {
+    withSourcesJar()
+
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+}

fabric/1.21/gradle.properties

@@ -0,0 +1,4 @@
+minecraft_version=1.21
+yarn_mappings=1.21+build.9
+fabric_version=0.102.0+1.21
+adventure_version=5.14.1

settings.gradle.kts

@@ -36,3 +36,5 @@ include("fabric:1.21.8")
 findProject(":fabric:1.21.8")?.name = "1.21.8"
 include("fabric:1.21.5")
 findProject(":fabric:1.21.5")?.name = "1.21.5"
+include("fabric:1.21")
+findProject(":fabric:1.21")?.name = "1.21"