Transition from Flutter to GTK

[ALEZ-DEV]

This PR has the goal to transition from Flutter to GTK

Why did I choose to change the frontend framework ?
For a very simple but important reason, the time to iterate, it take a VERY long time for me to iterate with the Flutter X Rust stack, because every time I want to add a little feature or make a very little change which is related to the interface, it will automatically take me more time, why ?
Because of a few other reasons :

1. I need to switch between Rust and Dart
2. Everytime, I need to write Protobuf files to pass message between Rust and Dart
3. I cannot just call a function from Dart to Rust, I need to use a certain method to handle the protobuf messages manually in the code, whereas I do not need to do that with gtk-rs
4. It add unecessary dependency to the project (Rinf)
5. I need to write a lot of Dart code just to show little (I really like Flutter though)

Here's my reason to refactor this part

I hope it will not take too long