[native, lib, web] move search sidebar functionality to lib hooks

Summary: move sidebar search to lib/hooks from web,native

Test Plan: use feature in both web and native

Reviewers: atul, palys-swm, def-au1t, ashoat

Reviewed By: atul, palys-swm

Subscribers: ashoat, Adrian, yayabosh

Differential Revision: https://phabricator.ashoat.com/D4022