[ADD] estate: add estate module for tutoriel

[jeanbfly]

No description provided.

[robodoo]

[YassinWalid]

Thanks for the incredible work. As an initial review, I left some comments in the PR, and some general ones below.

Don't forget to add an empty line at the end of each file. We mostly do this for a clean history, since if somebody adds a line at the end of the file, they'll technically be changing your line as well, messing up the git blame or history of that specific line.

For the order of attributes in the model, the naming of the xml ids, and other guidelines, you can follow the coding guidelines.

One minor comment, why do you put the string of your views "Channel", "Test", etc.?

[YassinWalid]

Thanks for the great work. I have one general comment. For the commit titles, the [ADD] tag should be used when adding a new module, but otherwise, for most of the other commits (except for the estate_account one), they are improvements to the estate module, so they should have the [IMP] tag. Also, don't forget to add the empty line to every file, not just the python files.

[YassinWalid]

nitpick(feel free to ignore it for now): we usually do the imports as from . import <model>

[YassinWalid]

what if the create_date is false? this would cause an error. Also, there is a fields.Date.today(), so we don't need to do the fields.Datetime.now().date() imo