Implement CI and coding standards

[jatkinson1000]

Add a CI framework for code and select standards to run to.

black
pylint
mypy
pydocstyle numpy convention

[jatkinson1000]

I started work on this in the cleanup branch, but this should probably do in it's own branch to tackle this issue.

@raehik can possibly add in pytest functionality when addressing #6

[raehik]

For reference, here's an example CI config with the on key highlighted. Runs the workflow on every push to main, and various actions to any pull request targeting any branch: raehik/strongweak/.github/workflows/ci.yml

on:
  push:
    branches:
    - main
  pull_request:
    types:
    - synchronize
    - opened
    - reopened

[jatkinson1000]

There seems to be a pre-commit app being run as part of actions/CI.
Do we want to keep this, and if so how should it be set up?
Currently raises failures on opening PRs, and it can probably be implemented as part of the other CI.

[raehik]

in a quick meeting @arthurBarthe suggested interest in having linting done by pre-commit.ci. xGCM do this. Though it won't run on a free private repo (either needs to be public, or paid).