[lib] add reply/replies back to sidebar inline engagement

Summary:
Based off this comment in Linear, we want to add the word reply/replies in order to differentiate the thread replies from the reactions

Linear Task: https://linear.app/comm/issue/ENG-3103/update-inlineengagement-for-native

Test Plan:
Please see the screenshots below:

Reviewers: atul, kamil

Reviewed By: kamil

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8317