Add modern Paper and region APIs

TODO.md

@@ -4,7 +4,7 @@
 |:-------:|:--------:|:------|
 | MET-001 |   Done   | Initialize Gradle in the project root, add the Gradle wrapper, and create the project build file. |
 | MET-002 |   Done   | Set Gradle project metadata and configure a Java toolchain compatible with the target modern Paper version. |
-| MET-003 |   Ready  | Configure repositories and compatible PaperMC, WorldEdit, WorldGuard, and other required or optional dependencies; add build plugins such as Shadow only if needed. |
+| MET-003 |   Done   | Configure repositories and compatible PaperMC, WorldEdit, WorldGuard, and other required or optional dependencies; add build plugins such as Shadow only if needed. |
 | MET-004 |   Ready  | Move or verify plugin.yml under src/main/resources, configure Gradle resource processing, and update its Paper api-version, dependencies, commands, permissions, and required fields. |
 | MET-005 |   Ready  | Add JUnit 5 test infrastructure and keep the default Gradle `test` task server-free. Use an in-memory Paper harness such as MockBukkit for Bukkit/Paper behavior and mocks or test doubles for WorldEdit, WorldGuard, and narrow API boundaries where appropriate. |
 | MET-006 |   Ready  | Build the initial Gradle project and run its tests; resolve build setup issues before removing the existing Maven build. |

build.gradle

@@ -6,6 +6,19 @@ plugins {
 group = 'com.majinnaibu.bukkitplugins'
 description = 'Metropolis'
 
+repositories {
+    mavenCentral()
+    maven { url = 'https://repo.papermc.io/repository/maven-public/' }
+    maven { url = 'https://maven.enginehub.org/repo/' }
+    mavenLocal()
+}
+
+dependencies {
+    compileOnly 'io.papermc.paper:paper-api:26.2.build.129-stable'
+    compileOnly 'com.sk89q.worldedit:worldedit-bukkit:7.4.5'
+    compileOnly 'com.sk89q.worldguard:worldguard-bukkit:7.0.19'
+}
+
 java {
     toolchain {
         languageVersion = JavaLanguageVersion.of(25)