Handle events in ethpy

[slundqui]

This PR is part of the consolidation effort to bring all event getters to ethpy. Overall, this allows us to handle specific interfaces (e.g., steth) in a single place.

• Move event classes from agent0 interface to ethpy interface, and have ethpy trade calls return the event object.
• Move all event getters to the ethpy interface.

[codecov]

Codecov Report

Attention: Patch coverage is 97.90576% with 4 lines in your changes missing coverage. Please review.

Project coverage is 82.39%. Comparing base (dab10b2) to head (94acf50).
Report is 110 commits behind head on main.

Files with missing lines	Patch %	Lines
src/agent0/ethpy/hyperdrive/transactions.py	95.65%	2 Missing ⚠️
src/agent0/chainsync/db/hyperdrive/convert_data.py	0.00%	1 Missing ⚠️
src/agent0/ethpy/base/transactions.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1571      +/-   ##
==========================================
+ Coverage   81.55%   82.39%   +0.84%     
==========================================
  Files          98       98              
  Lines        7163     7164       +1     
==========================================
+ Hits         5842     5903      +61     
+ Misses       1321     1261      -60     

Flag	Coverage Δ
unittests	82.39% <97.90%> (+0.84%)	⬆️

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