gitea/modules/eventsource
KN4CK3R a35749893b
Move `convert` package to services ()
Addition to 

The `convert` package relies heavily on different models which is
[disallowed by our definition of
modules](https://github.com/go-gitea/gitea/blob/main/CONTRIBUTING.md#design-guideline).
This helps to prevent possible import cycles.

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
..
event.go Implement FSFE REUSE for golang files ()
event_test.go Implement FSFE REUSE for golang files ()
manager.go Implement FSFE REUSE for golang files ()
manager_run.go Move `convert` package to services ()
messenger.go Implement FSFE REUSE for golang files ()