Harmonise Imports

[stufisher]

At the moment we have a mixture of local and absolute imports within the project

from pyispyb.app.extensions.auth.AbstractAuthentication import AbstractAuthentication
from .extensions.auth.bearer import JWTBearer

I think i'd prefer relative imports if the paths arent crazy (we'll have to check the rest of the source)

And also whats imported in what order, i would usually import as follows

import pythonstandards
import os
import sys

import dependency1
import fastapi

import local
from .module import a

This makes it clear whats a standard module, whats a dependency, and whats relative to the package. I'm open to discussion on this.

We should probably also apply isort to sort imports alphabetically