Some quality of life improvements for search

1. Type "in: <channel>" to find casts with hello in that channel 

2. Type "from: <username> hello" to find casts with hello from that user

Technically you can't have a space after the "from:" which is counterintuitive. Can we adjust it so searching "from: v" works too?

Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

Building /bright-moments - minting onchain art IRL | /purple #15 | FID 129 #magikarp

Rome, Metropolitan City of Rome Capital, Italy

i don’t think even twitter allows that, could be because [space] is how they are tokenizing the string