Review all the gov_*.go related files and simplify the code

[github-actions]

REFACTOR/DISCUSS: Should we prefix the functions in the `PersistenceModule` with the Param / Actor it's impacting to make autocomplete in implementation better? DISCUSS: Consider removing all `Set` methods (e.g. `SetAccountAmount`) and replace with `Add` (e.g. `AddAccountAmount`) by having it leverage a "default zero". REFACTOR(pokt-network#102): Split `account` and `pool` into a shared actor (e.g. like fisherman/validator/serviceNode/application) and simplify the code in half CLEANUP: Remove `tokens` or `stakedTokens` in favor of using `amount` everywhere since the denomination is not clear. As a follow up. Consider a massive rename to make the denomination explicit.

---

pocket/persistence/docs/README.md

Lines 179 to 184 in d552ec6

	- [ ] CLEANUP(https://github.com/pokt-network/pocket/issues/76): Review all the `gov_*.go` related files and simplify the code
	- [ ] REFACTOR/DISCUSS: Should we prefix the functions in the `PersistenceModule` with the Param / Actor it's impacting to make autocomplete in implementation better?
	- [ ] DISCUSS: Consider removing all `Set` methods (e.g. `SetAccountAmount`) and replace with `Add` (e.g. `AddAccountAmount`) by having it leverage a "default zero".
	- [ ] REFACTOR(https://github.com/pokt-network/pocket/issues/102): Split `account` and `pool` into a shared actor (e.g. like fisherman/validator/serviceNode/application) and simplify the code in half
	- [ ] CLEANUP: Remove `tokens` or `stakedTokens` in favor of using `amount` everywhere since the denomination is not clear. As a follow up. Consider a massive rename to make the denomination explicit.

---

This issue was generated by todo-issue based on a CLEANUP comment in d552ec6.