Implement a custom DKISTLogger

[Cadair]

This is inspired by Astropy's logger, but implemented independently because Astropy warn you against directly using theirs.

This module sets up the following things:

• A logging.Logger subclass which:
  • Tracks the module which triggered the log call.
  • Overrides warnings.showwarnings so that subclasses of given warning classes are displayed using the logger.
• Sets up a log instance which uses the Astropy StreamHandler class to log to stdout and colour the output.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (9e21599) 97.68% compared to head (197e829) 97.64%.

Files	Patch %	Lines
dkist/logger.py	96.22%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #317      +/-   ##
==========================================
- Coverage   97.68%   97.64%   -0.05%     
==========================================
  Files          32       33       +1     
  Lines        1854     1907      +53     
==========================================
+ Hits         1811     1862      +51     
- Misses         43       45       +2     

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