Implement restapi services to handle authentication flow

[ericof]

Fixes #38

[erral]

I have tested these endpoints together with the code on the main branch of volto-authomatic and it works perfectly.

I would somehow merge the documentation on DEVELOP.md and the existing on README.md regarding the configuration of KeyCloak.

I don't know if the best thing is to add this documentation in README and DEVELOP or perhaps add a new sphinx-based docs folder and deploy it to RTD.

[ericof]

@erral Is this good enough to be merged?

[mamico]

@ericof in general everything looks ok to me too. this afternoon I have some time to do a second check and give a second opinion as well. thx.

[erral]

Really nice, thanks!

[mamico]

Just a couple of comments. Otherwise absolutely awesome for me.

[mamico]

I am not (yet) generally using pip. For me make install was not enough, I also had to do:

python3.11 -m venv .
bin/pip install cookiecutter mxdev -c contraints.txt

Have I made a mistake or forgotten something?

[mamico]

@ericof @erral is it okay for you, if I invite you to the pypi project?

[erral]

Ok.

[ericof]

@mamico Please, also invite the collective user

[ericof]

@mamico Just confirming: users collective and ericof on pypi :-)