refactored the code

coin.py

@@ -0,0 +1,28 @@
+#!/usr/bin/python
+############################################################
+### Project: coin
+### File: __init__.py
+### Description: main file of coin
+### Version: 1.0
+############################################################
+import sys, os, glob
+import PyQt6
+import gui
+import tess
+
+def main():
+    model_names = tess.get_tess_model_names()
+
+    if len(model_names) == 0:
+        print("[ERR] No tesseract model found at", MODELS_PATH, file=sys.stderr)
+        sys.exit(1)
+
+    print("Available models:\n", model_names)
+    
+    app = PyQt6.QtWidgets.QApplication(sys.argv)
+    main_window = gui.coin_gui(model_names)
+    main_window.show()
+    sys.exit(app.exec())
+
+if __name__ == '__main__':
+    main()