[ADD] estate: added a real estate module

[mohannedah]

Created the estate module with a property model to be able to represent all the real estate listings that will be created in our system, so that the users will have the ability to submit offers on them.

[robodoo]

[SergeBayet]

You can mark this PR as ready to review (Click on the gray button: Ready to Review)

[SergeBayet]

For your second commit, the header is too long: Try to limit the header length to about 50 characters for readability. src: https://www.odoo.com/documentation/18.0/contributing/development/git_guidelines.html#commit-message-header

You can use git commit --amend to correct it.

[SergeBayet]

@vava-odoo This one for you. Cheers! :)