feat: rewrite application as modular fcco-Converter V2 with new GUI, metadata handling, and updater logic

test_ctk_btn.py

@@ -0,0 +1,23 @@
+import customtkinter as ctk
+
+app = ctk.CTk()
+app.geometry("400x300")
+
+def on_click():
+    print("Button clicked via command!")
+
+def on_bind(e):
+    print("Button clicked via bind!")
+
+b1 = ctk.CTkButton(app, text="Normal Command", command=on_click)
+b1.pack(pady=20)
+
+b2 = ctk.CTkButton(app, text="Bind Button-1")
+b2.bind("<Button-1>", on_bind)
+b2.pack(pady=20)
+
+b3 = ctk.CTkButton(app, text="Bind ButtonRelease-1")
+b3.bind("<ButtonRelease-1>", on_bind)
+b3.pack(pady=20)
+
+app.mainloop()