state events for pinning and unpinning

[Velin92]

fixes #3119

[github-actions]

	Warnings
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.
⚠️	You seem to have made changes to views. Please consider adding screenshots.

Generated by 🚫 Danger Swift against 15a0034

[stefanceriu]

Nice! 👍

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 77.42%. Comparing base (0c9da2c) to head (15a0034).
Report is 2 commits behind head on develop.

Files	Patch %	Lines
...ne/TimelineItems/RoomStateEventStringBuilder.swift	0.00%	10 Missing ⚠️
...perOptionsScreen/View/DeveloperOptionsScreen.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop    #3123    +/-   ##
=========================================
  Coverage    77.41%   77.42%            
=========================================
  Files          714      715     +1     
  Lines        55355    55613   +258     
=========================================
+ Hits         42855    43060   +205     
- Misses       12500    12553    +53     

Flag	Coverage Δ
unittests	68.39% <0.00%> (+0.14%)	⬆️

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