chore: Virtualized main room message list

[MartinSchoeler]

Proposed changes (including videos or screenshots)

Proof of concept of a MessageList component virtualization using Tanstack virtual

Known issues

• Jump to message behaving erratically
• Sometimes the scroll position flickers quickly while loading more messages
• When changing channels the scroll position is not recovered

No virtualization
https://github.com/user-attachments/assets/9aeb722c-cb75-4d4d-b091-d28593be2234

With virtualization
https://github.com/user-attachments/assets/cc2a1b64-cbc7-4b63-89f0-7e47c80001a4

Issue(s)

closes #31
CORE-1505

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.91%. Comparing base (692a891) to head (0bc46e6).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #39490      +/-   ##
===========================================
+ Coverage    70.87%   70.91%   +0.03%     
===========================================
  Files         3196     3197       +1     
  Lines       113288   113322      +34     
  Branches     20531    20491      -40     
===========================================
+ Hits         80294    80357      +63     
+ Misses       30943    30918      -25     
+ Partials      2051     2047       -4     

Flag	Coverage Δ
unit	71.65% <ø> (+0.06%)	⬆️

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