[Session] Add --start and --end to create session

[lcfd]

The trak create session command at the moment allow entering a time as starter and the hours/minutes that the session has lasted.

It would be a good idea to add new flags for a new workflow.

The start and end method.

This workflow allows more freedom for the user.
The user can provide datetime values as the start and end timings for the new session.

Why?

• Times is uncomfortable for long sessions
• Flexibility for external usage (in Neovim for example)

Proposal

trak create session --start [%Y-%m-%dT%H:%M] --end [%Y-%m-%dT%H:%M]

Notes

• Those flags will be incompatible with --hours and --minutes
• Probably the --when \ -w flag will be transformed in an alias to --start
  • No, --when is used in the ADD method, with --minutes and --hours.