[native] introduce reactions to inline sidebar

Summary:
introduce reactions to inline sidebar. Right now, going with a temporary solution of just showing the number of likes right now, but in a subsequent diff will be extending this to show more information about the reaction message

Depends on D5878

Linear Task: ENG-2408

Test Plan:
Please watch the demo video below to see how messages with reactions look like

Reviewers: atul, rohan, tomek

Reviewed By: atul, tomek

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D5813