[FEATURE] Add simple GUI for compiling and running test.me

[tauanesales]

Is your feature request related to a problem? Please describe.
People very new to programming might have trouble using this tool on the terminal.

Describe the solution you'd like
A graphical user interface. It might make things easier for newcomers to use this tool. It should:

1. Check if gcc is installed and open a pop up with a link to where to download and install it from (if it is not installed);
2. Compile test.me in the background;
3. Let the user select a file/folder with code and tests to run;
4. A "run tests" button (eg. "test.me!");
5. Show the tests output (from test.me) on the screen.

Describe alternatives you've considered
Development of a GUI with Python and Customtkinter (could be any other language/GUI framework).

Additional context
The context is: how to make this tool as easy as possible for teenagers in highschool, which are just starting learning how to program, to use this tool.