* move GitCommit to APIFormat convertion into convert package
* rename Commit convert functions
* move stopwatch to api convertion into convert package & rm unused code & extend test
* fix compare time
* Gitea not Gogs ;)
* Add Created and Updated to Milestone table and expose via API
* Expose to UI - To Overloaded ?!?
* fix unit test
Co-authored-by: techknowlogick <techknowlogick@gitea.io>