Create base class for action space

[alvarofpp]

We need a class that represents an agent's action space. This class must have a set of actions and allow the agent to know which actions are possible or not.

This issue depends on issue #67 being completed first.

Suggestions:

• Class name: ActionSpaceBase.
• Class path: urnai.actions.
• Source: https://github.com/UFRN-URNAI/urnai-tools/blob/main/urnai/agents/actions/base/abwrapper.py .

Notes:

• This is an abstract class, so it is important that it inherits from abc.ABC.
• You don't need the Savable class.