Feature Request: Multi-User websites

Hi all, would it be possible to implement shared access to analytics data through multiple accounts in Umami? For example, let's say our instance has the following:

• Website A
• Website B
• User C
• User D

I would like to modify the existing permission implementation to support User C AND User D having access to Website A, but only User C can access Website B.

Looking at the db schema Umami uses, this does not seem like a quick fix and is probably a breaking change. As I understand the schema currently, Umami has a column which denotes the user id that has access to a website analytics data. My suggested change is to add a new table to the schema which has the access rights per user and website. For example:

| UserId | WebsiteId |
| ----------- | --------------- |

Or perhaps the following

| UserId | WebsiteId | Role |
| ----------- | --------------- | ------- |

Thanks :)