Add support for arrow keys in "Custom commit message?" prompt (and all other prompts, also)

[alichtman]

Currently, input() is called for user input.

shallow-backup/shallow_backup/git_wrapper.py

Lines 252 to 254 in 608fd53

	custom_message = input(
	Fore.GREEN + Style.BRIGHT + "Custom message: " + Fore.RESET
	)

shallow-backup/shallow_backup/prompts.py

Line 48 in 608fd53

remote_url = input()

shallow-backup/shallow_backup/prompts.py

Line 23 in 608fd53

abs_path = expand_to_abs_path(input())

It looks like this can be fixed with a simple readline import: https://stackoverflow.com/a/77773215.