feat: switch to gradle

Author: iGabyTM

build.gradle.kts

@@ -0,0 +1,17 @@
+plugins {
+    java
+    id("com.github.johnrengelman.shadow") version ("7.0.0")
+}
+
+group = "at.helpch.placeholderapi.expansion"
+version = "3.0.0"
+
+repositories {
+    maven("https://papermc.io/repo/repository/maven-public/")
+    maven("https://repo.extendedclip.com/content/repositories/placeholderapi/")
+}
+
+dependencies {
+    compileOnly("io.papermc.paper:paper-api:1.17.1-R0.1-SNAPSHOT")
+    compileOnly("me.clip:placeholderapi:2.11.3")
+}

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'Server-Expansion'