TERM environment variable is not respected

Describe the bug

On OmniOS (Illumos, and potentially other OS families as well), the TERM environment variable is not respected when running hyfetch.

When setting TERM to xterm-mono, hyfetch still prints colors, which can be potentially dangerous to terminals that do not support colors, whether it be user choice or hardware/software support.

[x] Does this issue still occur in the master branch? (Required)

Expected behavior

Hyfetch should not print colors when TERM is set to xterm-mono.

Screenshots

Please include a screenshot of your system information if the specific system environment is relevant to the bug.

Config file

Please paste the content of ~/.config/hyfetch.json below:

{
    "preset": "rainbow",
    "mode": "rgb",
    "light_dark": "dark",
    "lightness": 0.65,
    "color_align": {
        "mode": "horizontal",
        "custom_colors": [],
        "fore_back": null
    },
    "backend": "neofetch",
    "args": null,
    "distro": null,
    "pride_month_shown": [],
    "pride_month_disable": false
}

Additional context

System information:

rl@rl:~$ uname -a
SunOS rl 5.11 omnios-r151050-49db1c0a0fe i86pc i386 i86pc

Python version:

rl@rl:~$ python3 -V
Python 3.12.4

hykilpikonna / hyfetch