Add Pooltogether protocol tests

[alexkeating]

Current dependencies on/for this PR:

• main
  • PR #6
  • PR #7
    • PR #9
    • PR #11
      • PR #12
      • PR #13
        • PR #14
        • PR #15 👈
          • PR #17

This comment was auto-generated by Graphite.

[github-actions[bot]]

Coverage after merging test/protocol-actions into main will be

67.39%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
PooltogetherGovernor.sol	68.42%	100%	66.67%	70%	149, 73, 96
src/lib
GovernorTimelockCompound.sol	65.57%	64.29%	63.64%	66.67%	111, 145, 170, 195, 197–198, 198, 198–200, 202, 205, 246, 254–255, 85–86