Added ability to generate clients with no metadata or setup.py

[dbanty]

Adds --meta option to the cli (defaulting to "poetry") which will allow generation of a setup.py (--meta=setup) or omitting the top-level altogether and just generating a consumable module (--meta=none).

Closes #120.

I don't use setup.py in my day to day, so I used this as a template and just filled in the blanks. If someone who uses that format more (@dtkav maybe?) could take a look that'd be great.

Also CC @pawamoy and @TMiguelT who were interested parties in this ticket.

[codecov]

Codecov Report

Merging #275 (73c99e9) into main (3ca219c) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #275   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           46        46           
  Lines         1314      1348   +34     
=========================================
+ Hits          1314      1348   +34     

Impacted Files	Coverage Δ
openapi_python_client/__init__.py	100.00% <100.00%> (ø)
openapi_python_client/cli.py	100.00% <100.00%> (ø)
...penapi_python_client/parser/properties/__init__.py	100.00% <100.00%> (ø)
...penapi_python_client/parser/properties/property.py	100.00% <100.00%> (ø)
openapi_python_client/parser/reference.py	100.00% <100.00%> (ø)
openapi_python_client/utils.py	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update caecb03...73c99e9. Read the comment docs.

[dbanty]

@bowenwr does anyone on your team want to review this before I merge it?

[bowenwr]

@bowenwr does anyone on your team want to review this before I merge it?

Thanks for asking, I wouldn't block on review from us! Cursory glance looks good.