Prohibit fork creation when user reached maximum limit of repositories

Description

If user has reached the maximum limit of repositories:

• they are not allowed to create repositories ✔
• but they can still fork ❌

In a broad sense, fork is to create a repository.

Gitea Version

1.19.0+dev

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

No response

Git Version

No response

Operating System

No response

How are you running Gitea?

build from source

Database

SQLite