FEAT: Add Clock In / Clock Out picker to track time

[GitMurf]

Add telescope picker to choose to start a new clock timer. Lets you choose from headlines to quickly start a timer. If you already have a timer / clock running it will first stop your other timer to start the new one (orgmode may do this automatically, i am not sure).

@lyz-code if any of these features I start proposing adding become out of scope to what you want this plugin to be, just let me know... i will not take any offense to it, haha ;-)

[lyz-code]

As long as you help on maintaining that part of the code, I'm fine with it!

[seflue]

Actually, I imagine a lot more features, I would love to have. Regarding clocking I currently would prioritize more a timestamp search, because I often need this to reveal, when I worked on what - which I currently do with live_grep, but the UX could be better. But this feature also sounds interesting - but it probably would need an extension of the OrgApi.