Handle TokenNotSet Error more gracefully

[ivyleavedtoadflax]

Currently we get the following traceback:

Traceback (most recent call last):
  File "/home/matthew/.local/bin/hugie", line 5, in <module>
    from hugie.__main__ import app
  File "/home/matthew/.local/pipx/venvs/hugie/lib/python3.10/site-packages/hugie/__main__.py", line 7, in <module>
    from hugie.endpoint import app as endpoint_app
  File "/home/matthew/.local/pipx/venvs/hugie/lib/python3.10/site-packages/hugie/endpoint.py", line 27, in <module>
    raise TokenNotSet
hugie.endpoint.TokenNotSet: You need to define a token using the environment variable HUGGINGFACE_READ_TOKEN

Let's catch this and just print to console instead in a more friendly way.

[nsorros]

What would be the desirable output? Now showing the traceback?

[ivyleavedtoadflax]

Yeah i think so, something a bit less scary looking