feat(backcore): Quarkus compatible with GUI/TUI

Added quarkus backcore run functionality so that it launches the TUI, GUI, Quarkus via modules: backcore:run

modules/ui/src/main/scala/de/nowchess/ui/Main.scala

@@ -1,20 +1,15 @@
 package de.nowchess.ui
 
 import de.nowchess.chess.engine.GameEngine
-import de.nowchess.ui.terminal.TerminalUI
 import de.nowchess.ui.gui.ChessGUILauncher
+import de.nowchess.ui.terminal.TerminalUI
 
 /** Application entry point - starts both GUI and Terminal UI for the chess game. Both views subscribe to the same
   * GameEngine via Observer pattern.
   */
 object Main:
   def main(args: Array[String]): Unit =
-    // Create the core game engine (single source of truth)
     val engine = new GameEngine()
-
-    // Launch ScalaFX GUI in separate thread
     ChessGUILauncher.launch(engine)
-
-    // Create and start the terminal UI (blocks on main thread)
     val tui = new TerminalUI(engine)
     tui.start()