a maintainership transfer request masquerading as a PR

[joshhubert-dsp]

Hi @mmohades,
I forked @j027's fork of your repo and significantly updated it, with the initial purpose of fixing payments. But I got a little carried away... and now I'm asking your permission to take over maintainership and create a new PyPi package, either with the same name or a different one, whichever you're comfortable with.

FORK UPDATES (copied from updated README)

• Payments work again! Credit to Joseph Charles for
  adding eligibility token support and laying the groundwork.
• Added PaymentApi.get_transfer_destinations() and PaymentApi.initiate_transfer()
  for standard/instant transfers to bank/card.
• Requires Python 3.11+, using a pyproject.toml (uv friendly) and modern language
  features.
• The data models now use pydantic-v2, removing a bunch of boilerplate.
• Set the env var LOGGING_SESSION to print the raw requests sent and responses
  received.
• venmo.Client has context manager dunder methods for with block logout using a
  stored access token.
• I got rid of the threaded-async callback functionality, because it added complexity
  that I didn't see as useful. In my experience Venmo is now quick to pump the brakes
  on anyone hitting the API too rapidly. This manifests in the dreaded 403 response:
  "OAuth2 Exception: Unable to complete your request. Please try again later", locking
  you out of your account with a variable cooldown time.
• Request headers now mirror the actual app's as closely as possible. The default
  headers live in default_headers.json.
• All code docstrings have been updated with changes.

Let me know if this works for you, or if there's anything else I should do. Currently I credit you and @j027 as authors in the pyproject. I'll update the Sphinx docs if/when I get your blessing.