feat(M1): Fabric scaffold for MC 1.21.6 with /videoStick

- video_player mod id, 영상재생모드 display name
- VideoAnchorBlock + VideoAnchorBlockEntity (placeholder)
- VideoStickItem
- /videoStick (+ /videostick alias) command gives the stick
- gradle 9.5.1 wrapper, fabric-loom 1.16.2, Java 21 toolchain
- works in both singleplayer and dedicated server (environment: *)

build.gradle

@@ -0,0 +1,53 @@
+plugins {
+    id 'fabric-loom' version '1.16.2'
+    id 'maven-publish'
+    id 'java'
+}
+
+version = project.mod_version
+group = project.maven_group
+
+base {
+    archivesName = project.archives_base_name
+}
+
+repositories {
+    mavenCentral()
+    maven { url = 'https://maven.fabricmc.net/' }
+}
+
+dependencies {
+    minecraft "com.mojang:minecraft:${project.minecraft_version}"
+    mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
+    modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
+    modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
+}
+
+processResources {
+    inputs.property "version", project.version
+    inputs.property "mod_id", project.mod_id
+
+    filesMatching("fabric.mod.json") {
+        expand "version": project.version, "mod_id": project.mod_id
+    }
+}
+
+tasks.withType(JavaCompile).configureEach {
+    it.options.release = 21
+}
+
+java {
+    withSourcesJar()
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
+jar {
+    from("LICENSE") {
+        rename { "${it}_${project.archives_base_name}" }
+    }
+}