Update Minecraft version compatibility and add Quilt mod configuration

gradle.properties

@@ -3,8 +3,8 @@ org.gradle.jvmargs=-Xmx1G
 org.gradle.parallel=true
 # Fabric Properties
 # check these on https://fabricmc.net/develop
-minecraft_version=1.21.4
+minecraft_version=1.20
-yarn_mappings=1.21.4+build.8
+yarn_mappings=1.20+build.1
 loader_version=0.16.10
 # Mod Properties
 mod_version=2.0.0

src/main/java/arzumify/polyenergy/Polyenergy.java

@@ -1,9 +0,0 @@
-package arzumify.polyenergy;
-
-import net.fabricmc.api.ModInitializer;
-
-public class Polyenergy implements ModInitializer {
-    @Override
-    public void onInitialize() {
-    }
-}

src/main/resources/fabric.mod.json

@@ -14,14 +14,9 @@
   "license": "GPL-3.0",
   "icon": "assets/polyenergy/icon-scaled.png",
   "environment": "*",
-  "entrypoints": {
-    "main": [
-      "arzumify.polyenergy.Polyenergy"
-    ]
-  },
   "depends": {
     "fabricloader": ">=0.16.10",
-    "minecraft": "~1.21.4",
+    "minecraft": ">1.20",
     "java": ">=21",
     "fabric-api": "*"
   }

src/main/resources/quilt.mod.json

@@ -0,0 +1,40 @@
+{
+  "schema_version": 1,
+  "quilt_loader": {
+    "group": "${group}",
+    "id": "polyenergy",
+    "version": "${version}",
+    "metadata": {
+      "name": "Polyenergy",
+      "description": "A dead-simple serverside energy api",
+      "contributors": {
+        "Arzumify": "Owner"
+      },
+      "contact": {
+        "homepage": "https://git.ailur.dev/arzumify/polyenergy/",
+        "sources": "https://git.ailur.dev/arzumify/polyenergy",
+        "issues": "https://git.ailur.dev/arzumify/polyenergy/issues"
+      },
+      "icon": "assets/polyenergy/icon-scaled.png",
+      "license": "GPL-3.0"
+    },
+    "intermediate_mappings": "net.fabricmc:intermediary",
+    "repositories": [
+      "https://maven.ailur.dev/"
+    ],
+    "depends": [
+      {
+        "id": "quilt_loader",
+        "versions": ">=0.19.1"
+      },
+      {
+        "id": "quilted_fabric_api",
+        "versions": ">=7.0.2"
+      },
+      {
+        "id": "minecraft",
+        "versions": ">=1.20"
+      }
+    ]
+  }
+}