Added Member Class Information retrival

[chrisdedman]

Description

Add a command to retrieve member information and a new Member class to manage member-related functionalities.

close #102

Type of Change

• Feature
• Refactor
• Bug fix
• Documentation
• Other: ___

Pre-merge Checklist

• Run tests: pytest
• Run type check: mypy
• Run formatting: black .

[PenguinBoi12]

The foundation of the PR is solid, it's going to be much easier to interact with users. The code in general is clean but there's a few issues with the tests and calls.

Some of those methods are doing request to matrix, like get_displayname, get_profile, etc, but there's not response validation, so if an error happens it's just going to explode. There's a helper in api called matrix_call that helps with that.

There's cases, like profile, where it might change the behaviour, if you still want to return a default value, although maybe it's better to raise (idk), you can try/catch it.

Additionally, your tests don't seem to have those possible failure covered.

[PenguinBoi12]

Almost there, a few minor thing to update and it's good to go.