[14.0][ADD]resource_booking_portal

[adasatorres]

Hi, this addon allow create a booking to portal users from portal if these have permission.

1. Create a portal user and activate the "Create booking from portal" option available in the user's form view. (You can also activate it from the "Give Portal Access" option in contacts.)

2. Once you have a user with the corresponding permissions, go to the portal. There, you will see a new section called "Actions" with the option to create a booking.

3. Inside the form, you only need to add a subject, choose the type of booking, and optionally add a description.

4. When you continue, the booking will be created, using your contact as the requester and enabling the automatic mode for combinations.

5. Next, a calendar will appear for you to schedule an appointment with your assigned sales representative.