Add lint-fix support to the run commands

[neilcampbell]

Once we have the changes in #61 merged, we'll likely have ideas for other run commands we want to add.

An examples of this is lint-fix, which would look something like below:

lint-fix = { commands = [
  'poetry run black .',
  'poetry run ruff . --fix',
  'poetry run mypy',
], description = 'Perform linting with --fix' }

We'll need to also add this to the other python template with the lint run command.

[CiottiGiorgio]

With the assumption that lint-fix is something you want to run frequently when developing (or setting up a watch process that does it automatically), I think we can consider not calling mypy because there's no "fix" option for it.
What do you think?

[neilcampbell]

@CiottiGiorgio Yeah I think that makes sense.