Store time locally

[Hu1buerger]

I like to UI from DarkyenusTimeTracker and the automatic tracking. But I do think that it is lacking in storing the data.

Usecase:

Tracking the time used on a file or a commit is useful to know. Thats why a user would use a time tracker. But pushing that time to GitHub can be undesirable.

Proposal:

I am therefore proposing to add the time trackings to IntelliJ local history or lets use gtm see here which seems to handle the knowledge quite well.

[Hu1buerger]

Would be good with #37