Migrate to new Hytale plugin template structure

Replaces the previous Kotlin-based Gradle build and template files with a new Java-based Gradle build system and updated example plugin code. Removes old build scripts, plugin template, and configuration, and introduces a new ExamplePlugin with updated manifest, command, and recipe example. Updates documentation and project configuration to match the new structure and usage.

src/main/resources/Server/Item/Recipes/Example_Recipe.json

@@ -0,0 +1,22 @@
+{
+  "Input": [
+    {
+      "ItemId": "Soil_Dirt",
+      "Quantity": 10
+    }
+  ],
+  "PrimaryOutput": {
+    "ItemId": "Soil_Dirt",
+    "Quantity": 1
+  },
+  "BenchRequirement": [
+    {
+      "Id": "Fieldcraft",
+      "Type": "Crafting",
+      "Categories": [
+        "Tools"
+      ]
+    }
+  ],
+  "Seconds": 1
+}