refactor: Migrate to Gradle version catalog and Maven-based Meteor dependency

Major build system modernization:
- Migrate from gradle.properties to libs.versions.toml version catalog
- Centralize all dependency versions in version catalog format
- Update Meteor Client dependency from local JAR to Maven SNAPSHOT
- Remove libs/ directory and bundled meteor-client JAR files
- Modernize build.gradle.kts with catalog references (libs.*)
- Streamline gradle.properties to only essential project properties

This change improves dependency management, makes version updates clearer,
and aligns with modern Gradle best practices. Meteor Client is now pulled
from maven.meteordev.org as a SNAPSHOT dependency instead of being bundled.

Author: claude

build.gradle.kts

@@ -1,10 +1,10 @@
 plugins {
-    id("fabric-loom") version "1.12-SNAPSHOT"
+    alias(libs.plugins.fabric.loom)
 }
 
 base {
     archivesName = properties["archives_base_name"] as String
-    version = properties["mod_version"] as String
+    version = libs.versions.mod.version.get()
     group = properties["maven_group"] as String
 }
 
@@ -18,40 +18,35 @@ repositories {
         name = "meteor-maven-snapshots"
         url = uri("https://maven.meteordev.org/snapshots")
     }
-    flatDir {
-        dirs("libs")
-    }
 }
 
 dependencies {
-    // Fabric
-    minecraft("com.mojang:minecraft:${properties["minecraft_version"] as String}")
-    mappings("net.fabricmc:yarn:${properties["yarn_mappings"] as String}:v2")
-    modImplementation("net.fabricmc:fabric-loader:${properties["loader_version"] as String}")
-
-    // Meteor - using local JAR for consistent version
-    modImplementation(files("libs/meteor-client-${properties["meteor_version"] as String}.jar"))
+    // Minecraft
+    minecraft(libs.minecraft)
+    mappings(variantOf(libs.yarn) { classifier("v2") })
+    modImplementation(libs.fabric.loader)
 
-    // Compile-time access to Orbit event bus (provided by Meteor at runtime)
-    compileOnly("meteordevelopment:orbit:0.2.4")
+    // Meteor Client
+    modImplementation(libs.meteor.client)
+    compileOnly(libs.orbit)
 
     // NanoHTTPD for HTTP server and WebSocket support
-    modImplementation("org.nanohttpd:nanohttpd:2.3.1")!!.let { include(it) }
-    modImplementation("org.nanohttpd:nanohttpd-websocket:2.3.1")!!.let { include(it) }
+    modImplementation(libs.nanohttpd.core)!!.let { include(it) }
+    modImplementation(libs.nanohttpd.websocket)!!.let { include(it) }
 
     // JSON serialization for WebSocket messages
-    modImplementation("com.google.code.gson:gson:2.11.0")!!.let { include(it) }
+    modImplementation(libs.gson)!!.let { include(it) }
 
     // Testing
-    testImplementation("org.junit.jupiter:junit-jupiter-api:5.10.2")
-    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.10.2")
+    testImplementation(libs.junit.api)
+    testRuntimeOnly(libs.junit.engine)
 }
 
 tasks {
     processResources {
         val propertyMap = mapOf(
             "version" to project.version,
-            "mc_version" to project.property("minecraft_version"),
+            "mc_version" to libs.versions.minecraft.get(),
         )
 
         inputs.properties(propertyMap)

gradle.properties

@@ -1,15 +1,6 @@
 org.gradle.jvmargs=-Xmx4G
 org.gradle.configuration-cache=false
 
-# Fabric Properties (https://fabricmc.net/develop)
-minecraft_version=1.21.10
-yarn_mappings=1.21.10+build.2
-loader_version=0.17.3
-
 # Mod Properties
-mod_version=0.2.0
 maven_group=com.cope.meteorwebgui
 archives_base_name=meteor-webgui
-
-# Dependencies
-meteor_version=1.21.10-32

gradle/libs.versions.toml

@@ -0,0 +1,44 @@
+[versions]
+# Mod Properties
+mod-version = "0.2.0"
+
+# Minecraft
+minecraft = "1.21.10"
+yarn-mappings = "1.21.10+build.2"
+fabric-loader = "0.17.3"
+loom = "1.12-SNAPSHOT"
+
+# Dependencies
+meteor = "1.21.10-SNAPSHOT"
+orbit = "0.2.4"
+
+# WebServer and WebSocket
+nanohttpd = "2.3.1"
+gson = "2.11.0"
+
+# Testing
+junit = "5.10.2"
+
+[libraries]
+# Minecraft
+minecraft = { module = "com.mojang:minecraft", version.ref = "minecraft" }
+yarn = { module = "net.fabricmc:yarn", version.ref = "yarn-mappings" }
+fabric-loader = { module = "net.fabricmc:fabric-loader", version.ref = "fabric-loader" }
+
+# Meteor
+meteor-client = { module = "meteordevelopment:meteor-client", version.ref = "meteor" }
+orbit = { module = "meteordevelopment:orbit", version.ref = "orbit" }
+
+# WebServer
+nanohttpd-core = { module = "org.nanohttpd:nanohttpd", version.ref = "nanohttpd" }
+nanohttpd-websocket = { module = "org.nanohttpd:nanohttpd-websocket", version.ref = "nanohttpd" }
+
+# JSON
+gson = { module = "com.google.code.gson:gson", version.ref = "gson" }
+
+# Testing
+junit-api = { module = "org.junit.jupiter:junit-jupiter-api", version.ref = "junit" }
+junit-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref = "junit" }
+
+[plugins]
+fabric-loom = { id = "fabric-loom", version.ref = "loom" }