feat: show read receipt in message header (WPB-6284)

[V-Gira]

WPB-6284 [Web] Message Group Header Read indicators

Description

Screenshots/Screencast (for UI changes)

Checklist

• [ ] PR has been self reviewed by the author;
• [ ] Hard-to-understand areas of the code have been commented;
• [ ] If it is a core feature, unit tests have been added;

Important details for the reviewers

(Delete this section if unnecessary)

• use (x) data
• can be reviewed commit-by-commit
• be sure to look at ...

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 45.97%. Comparing base (660e673) to head (32cb18a). Report is 3 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #16851   +/-   ##
=======================================
  Coverage   45.97%   45.97%           
=======================================
  Files         748      748           
  Lines       24494    24496    +2     
  Branches     5592     5593    +1     
=======================================
+ Hits        11262    11263    +1     
  Misses      11807    11807           
- Partials     1425     1426    +1