[lib] introduced sendReactionMessageActionTypes

Summary:
introduced sendReactionMessageActionTypes. These will be used in subsequent diffs mainly in message-reducer

Linear Task: ENG-2248

Test Plan: flow also ran app locally on web/native and nothing crashed and there were no regressions. Will continue testing in subsequent diffs

Reviewers: atul, tomek, rohan

Reviewed By: atul, tomek

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D5769