[IMPROVE] Read receipts in threads

[matheusbsilva137]

Proposed changes (including videos or screenshots)

• Create new afterReadThread callback to handle read receipts for messages in threads;
• Add read receipts for messages in threads only when the thread is open;
• Remove the read/unread checkmark for messages in threads.

Issue(s)

Steps to test or reproduce

1. Go to Administration > Message and enable "Show Read Receipts" and "Detailed Read Receipts";
2. Login with two users and access the same room with both of them;
3. As "User 1", send a message in an existing thread;
4. Access this room as "User 2". Expected behavior: the message sent in step 3 should NOT be marked as read by "User 2";
5. As "User 2", send a message in the room (not in the thread). Expected behavior: the message sent in step 3 should still NOT be marked as read by "User 2";
6. Open the thread as "User 2". Expected behavior: the message sent in step 3 should be marked as read by "User 2";
7. Send a new message in the thread. Expected behavior: the new message should be instantly marked as read by both users.

Further comments

[codecov[bot]]

Codecov Report

Merging #26611 (141b07e) into develop (f53520f) will decrease coverage by 2.76%. The diff coverage is 0.00%.

:exclamation: Current head 141b07e differs from pull request most recent head 591ce76. Consider uploading reports for the commit 591ce76 to get more accurate results

@@             Coverage Diff             @@
##           develop   #26611      +/-   ##
===========================================
- Coverage    41.20%   38.44%   -2.77%     
===========================================
  Files          845      794      -51     
  Lines        18291    19005     +714     
  Branches      2078     1937     -141     
===========================================
- Hits          7537     7306     -231     
- Misses       10479    11406     +927     
- Partials       275      293      +18     

Flag	Coverage Δ
e2e	38.44% <0.00%> (-2.77%)	:arrow_down:

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[milton-rucks]

Let's hold this one for 6.0