[IMP] controllers

[cammarosano]

This PR adds some missing features related to controllers.

• request now evaluates to Request class
• request.env now evaluates to Environment | None
• subscript on request's env is now supported. E.g. request.env["res.partner"] evaluates to the model

Next steps:
In a Controller, self.env still does not work, as env is a property (which simply returns request.env), and properties are not resolved to their return types.
Support for resolving property types is introduced by #511, which should then:

• enable self.env in a Controller class
• enable request.env before 15.3, in which request is an instance of WebRequest, which in turn has env as a property.

[github-actions]

⚠️ A 'println!(' statement was found in the commit. Please ensure debug statements are removed before merging.

[cammarosano]

I've just realized that the 2nd commit in this PR handles the same issue as @mmahrouss 's PR: #488
Dropping it. For the record: 80b805c.

[cammarosano]

This PR must be adapted to odoo/odoo#240683, that moves request (and Request) from http.py to requestlib.py
Edit: done.

[andg-odoo]

@cammarosano Hi! I've been doing a few PRs recently on the IAP side which is basically all controllers, and definitely missing the environment access on request. Just wondering if this PR is still in the works? I checked out the branch locally and it's been working well for what I need for the past bit so it would be nice to have it merged with all the other cool features of alpha.

Thanks again for all your work on this! :)

[fda-odoo]

We'll try to include this branch in the 1.3. @cammarosano can you rebase it on alpha?

[cammarosano]

We'll try to include this branch in the 1.3. @cammarosano can you rebase it on alpha?

Done

[fda-odoo]

well done !