[FR] Allow navigating to any ticket by knowing its id only

[luolong]

I want to enable external issue tracker integration in Gitea projects to Taiga.

For this, I need to be able to provide a single URL template for a numeric ticket ID.
Because ticket links in Taiga contain ticket type element, there is no way to compose a universal issue reference link based on ticket number alone.

Moreover, I can't configure multiple links to Taiga issue tracker in Gitea, so I need a way to greate a link that can open any type of ticket referenced by its number in Taiga.

I propose to add a single endpoint that takes an id of any ticket as a path argument and redirects to a proper url based on a ticket type.

Something along the lines of:

GET /project/{project}/ticket/{id}