feat: deep search

[maxkomarychev]

Currently reactoron only tests field if it is a string but this does not work well if tron.log is called with arrays or objects.

This change tries to stringify value and test it against search condition.

[maxkomarychev]

well maybe that's a bit brute force solution. I could change it to traverse structures deeply but imo stringify is better since it's actually filtering by keys in objects lmk if that's good, thanks :)

[markrickert]

Thanks for this idea. This is probably a long time coming... closing this in favor of #1417. I'm going to have some people test it out and see if this adversely affects performance or not. And if not, we'll merge it. This should make timeline searching much better!