Create tests for new "Self" action and corresponding view actions in the do_self_action of actionmanagement.c

[Don-Osipov]

We will create a new module in the tests/action_management folder since we previously created a new action type for self actions. do_self_action takes a target action to do on self, which right now includes "stats" and "effects", although it can and probably will be expanded on later. These actions are used by the CLI team to print out the current stats and stat effects of the player.
We will test both the do_self_action as a whole, and also the corresponding action functions that do_self_action uses

[HarrisonD123]

Created a new Wiki page describing do_self_actions along with other action functions, which will be extremely helpful for new teams writing tests for this function.
https://github.com/uchicago-cs/chiventure/wiki/Action-Management-~-Do-Action-Functions