Doesn't work on non-win32 os

Required change:
class style():
BLACK = ""
RED = ""
GREEN = ""
YELLOW = ""
BLUE = ""
MAGENTA = ""
CYAN = ""
WHITE = ""
UNDERLINE = ""
RESET = ""
to
class style():
BLACK = lambda x: str(x)
RED = lambda x: str(x)
GREEN = lambda x: str(x)
YELLOW = lambda x: str(x)
BLUE = lambda x: str(x)
MAGENTA = lambda x: str(x)
CYAN = lambda x: str(x)
WHITE = lambda x: str(x)
UNDERLINE = lambda x: str(x)
RESET = lambda x: str(x)

Find the style class in the codebase, likely in a file handling terminal colors. Change the empty string constants to lambda functions that return the input as a string. Test by running the CLI on a non-Windows OS to verify colors are disabled gracefully.

索引モデルが issue の本文から書いたものです。