[enhancement request] add autocomplete for project names to the bash autocomplete function

[pedroangelini]

I found the semi-hiddend autocomplete bash script and was very glad to enable it.
Without adding too much overhead, it would be nice if the autocomplete also handled adding project names when you run timetrace start <tab>.
For this, maybe the timetrace list project could have a -1 option (similar to ls -1) that returns only the keys of the projects.
Then it would be "easy" to enhance the existing autocomplete script to allow for this.

I'm willing to try learning a bit of Go to implement this at some point in the next 2 or 3 months :)