fix: Refactored to Gradle-based project, and added dependencies

src/main/java/uulm/teamname/marvelous/gamelibrary/json/JSON.java

@@ -0,0 +1,25 @@
+package uulm.teamname.marvelous.gamelibrary.json;
+
+import jdk.jshell.spi.ExecutionControl;
+
+/** Contains JSON encoding and decoding.
+ */
+public class JSON {
+    /** Deserializes an incoming network message into a {@link MessageStructure}.
+     * @param input The JSON to deserialize.
+     * @return The parsed message.
+     */
+    public static MessageStructure[] parse(String input) throws ExecutionControl.NotImplementedException {
+        //TODO: implement JSON.parse
+        throw new ExecutionControl.NotImplementedException("JSON.parse is not implemented");
+    }
+
+    /** Serializes a {@link MessageStructure} into a JSON string.
+     * @param input The message to serialize.
+     * @return The message as JSON.
+     */
+    public static String stringify(MessageStructure input) throws ExecutionControl.NotImplementedException {
+        //TODO: implement JSON.stringify
+        throw new ExecutionControl.NotImplementedException("JSON.stringify is not implemented");
+    }
+}