Some improvements

[lkabuci]

This PR contains the following changes:

• removing unnecessary variables
• improve some functionalities
• refactoring
• linting with black
• add other stuff to .gitignore
• Edit the contributor's list to be dynamically generated with icons

[trakBan]

I don't like linting because this code uses a lot of colored() functions so the source code looks weird with it.

[trakBan]

I have checked and tested the code. Thanks for contributing to spongebob-cli.