Improve tea time (#319)

better docs

add --mine flag

hm, is there a better name? 🤔

do time filtering serverside

make printed fields dynamic

add --fields to tea times ls

code review

Co-authored-by: Norwin Roosen <git@nroo.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/319
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-Authored-By: Norwin <noerw@noreply.gitea.io>
Co-Committed-By: Norwin <noerw@noreply.gitea.io>

cmd/times.go

@@ -26,4 +26,5 @@ var CmdTrackedTimes = cli.Command{
 		&times.CmdTrackedTimesReset,
 		&times.CmdTrackedTimesList,
 	},
+	Flags: times.CmdTrackedTimesList.Flags,
 }