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

src/main/java/uulm/teamname/marvelous/gamelibrary/requests/Request.java

@@ -0,0 +1,9 @@
+package uulm.teamname.marvelous.gamelibrary.requests;
+
+import uulm.teamname.marvelous.gamelibrary.json.MessageStructure;
+
+/** Represents an abstract request sent inside a {@link MessageStructure} between client and server.
+ */
+public abstract class Request {
+    //TODO: implement Request
+}