Add a developer option button for marking every single room as read

[stefanceriu]

This will use an underlying SDK method and send a private read receipt plus a fully read marker in every single room the user is part of. It will most likely be a long operation that will get rate limited so the task is set to run detached for as long as it takes.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@6aec4f2). Learn more about missing BASE report.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...perOptionsScreen/View/DeveloperOptionsScreen.swift	0.00%	16 Missing ⚠️
...ptionsScreen/DeveloperOptionsScreenViewModel.swift	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #5582   +/-   ##
==========================================
  Coverage           ?   74.62%           
==========================================
  Files              ?      812           
  Lines              ?    54932           
  Branches           ?        0           
==========================================
  Hits               ?    40995           
  Misses             ?    13937           
  Partials           ?        0           

Flag	Coverage Δ
unittests	64.64% <0.00%> (?)

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