add mcgregor; and brown and foster

[Sachagobeyn]

Adds McGregog; and Brown and Foster, to do:

• [x] check frequency requirements data.
• [x] add unit test.
• [x] update docs

[github-actions[bot]]

:point_left: Launch a binder notebook on this branch

[Sachagobeyn]

Also includes renaming as stated in https://github.com/watem-sedem/rfactor/issues/82#issuecomment-2129153189

[Sachagobeyn]

Formulas are now checked and corrected by @SethCallewaert (and @claudiacagn if you like). Note that all formulas apply on 10 minute resolution, I added this to the documentation and getting started

[Sachagobeyn]

Last to do:

• [x] add test case for brown and foster / McGregor
• [x] add unit tests

[Sachagobeyn]

@SethCallewaert : I added unit tests for the Mcgregor / Brown and Foster formula.

Comparin both methods to Verstraeten, this is what I computed (using maximum intensity function):

and using maximum intensity matlab clone