Add more ruff rules

[dopplershift]

Add more rules to our ruff config. Current ones I'm seeing:

• Pathlib PTH
• Pytest style PT
• PyLint PL

A brief check shows some things I'd want to look into with the first two. Pylint will need to be more judicious, since a brief look seems to show some things I don't care to fix (overwriting loop variables). That said, I also just saw this while writing:

PLW0177 Comparing against a NaN value; use `math.isnan` instead
    --> src/metpy/io/gempak.py:2599:12
     |
2598 |         station['TIME'] = parsed.date_time.time()
2599 |         if math.nan in [parsed.altimeter, parsed.elevation, parsed.temperature]:
     |            ^^^^^^^^
2600 |             station['PMSL'] = missing
2601 |         else:
     |

which is suspicious but somehow isn't a bug, though should be changed anyways:

import math

a = [1, 1.1, math.nan]

math.nan in a

True

[dopplershift]

Ok, based on this post it seems to be that is is getting the nan check above to work. But if you change the source of nan (since IEEE-754 defines many nans that differ bit-wise), you can get it to fail:

import math

a = [1, 1.1, float('nan')]

math.nan in a

False

So the issue found by the PLW rule above is definitely a bug that should be fixed.