FR-11: Mark Property as Sold or Rented

Description

As an authenticated user, I want to mark a property as sold or rented so that it is no longer listed as available.

Context

Sold/rented means unavailable.

This should also use API routing (see https://hexdocs.pm/phoenix/routing.html and https://hexdocs.pm/phoenix/json_and_apis.html).

Acceptance Criteria

• AC1 - The user should be able to mark their property as sold/rented in the advertisement.
• AC2 - The user should not be redirected to an edit page, rather than the edit should be made in place.
• AC3 - The user should see the new status right after clicking on the new status.
• AC4 - The user should see a flash message on successful update.

Dependencies

Requires #18 (closed)