chore(main): docs & disable resizable window

app/src/main/java/org/vibecoders/moongazer/Main.java

@@ -6,10 +6,18 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import static org.vibecoders.moongazer.Constants.*;
 
+/**
+ * Main entry point for the Moongazer game application.
+ */
 public class Main {
 
     private static final Logger log = LoggerFactory.getLogger(Main.class);
 
+    /**
+     * Launches the game application with specified configuration.
+     * 
+     * @param args Command line arguments
+     */
     public static void main(String[] args) {
         Lwjgl3ApplicationConfiguration cfg = new Lwjgl3ApplicationConfiguration();
         cfg.setTitle(WINDOW_TITLE);
@@ -17,6 +25,7 @@ public class Main {
         cfg.useVsync(true);
         cfg.setIdleFPS(10);
         cfg.setWindowIcon("icons/logo.png");
+        cfg.setResizable(false);
         log.info("Starting game client...");
         new Lwjgl3Application(new Game(), cfg);
     }