Enable NRT for Collections and Proxies namespace

[axunonb]

Including necessary NRT updates to

• CalendarComponents
  • Alarm
  • CalendardEvent
  • FreeBusy
  • Journal
  • Todo
  • VTimeZone
  • Interfaces.IValueObject
  • Proxies.GroupedCollectionProxy
  • Proxies.GroupedValueListProxy
• DataTypes.CalendarDataType
• Evaluation.TodoEvaluator
• Proxies
  • CalendarObjectListProxy
  • IUniqueComponentList
  • UniqueComponentListProxy
  • ParameterCollectionProxy
• CalendarParameter
• CalendarProperty
• VTimeZoneInfo
• some unit tests

The transition to NRT in this pull request required significant effort, particularly due to challenges with the Collections namespace and the handling of Proxies. These areas demanded careful adjustments to ensure compatibility, also given the low unit test coverage.

@minichma Due to vacation I'll merge the PR, so that I can move on with NRT over the next days. Reviews and necessary corrections could then be done after the NRT transition is completed.

[codecov]

Codecov Report

Attention: Patch coverage is 39.02439% with 75 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
Ical.Net/Collections/GroupedList.cs	34%	22 Missing and 5 partials ⚠️
...l.Net/Collections/Proxies/GroupedValueListProxy.cs	36%	14 Missing and 2 partials ⚠️
Ical.Net/Proxies/UniqueComponentListProxy.cs	0%	6 Missing and 1 partial ⚠️
Ical.Net/CalendarParameter.cs	55%	5 Missing ⚠️
Ical.Net/Proxies/ParameterCollectionProxy.cs	17%	5 Missing ⚠️
....Net/Collections/Proxies/GroupedCollectionProxy.cs	57%	3 Missing ⚠️
Ical.Net/CalendarComponents/Alarm.cs	0%	2 Missing ⚠️
Ical.Net/Collections/GroupedListEnumerator.cs	60%	0 Missing and 2 partials ⚠️
Ical.Net/Evaluation/TodoEvaluator.cs	33%	1 Missing and 1 partial ⚠️
Ical.Net/VTimeZoneInfo.cs	0%	2 Missing ⚠️
... and 4 more

❌ Your patch status has failed because the patch coverage (39%) is below the target coverage (80%). You can increase the patch coverage or adjust the target coverage.
❌ Your project status has failed because the head coverage (67%) is below the target coverage (80%). You can increase the head coverage or adjust the target coverage.

@@         Coverage Diff         @@
##           main   #769   +/-   ##
===================================
  Coverage    67%    67%           
===================================
  Files       104    104           
  Lines      4499   4490    -9     
  Branches   1113   1111    -2     
===================================
- Hits       3003   2998    -5     
+ Misses     1066   1064    -2     
+ Partials    430    428    -2     

Files with missing lines	Coverage Δ
Ical.Net/CalendarComponents/FreeBusy.cs	48% <ø> (ø)
Ical.Net/CalendarComponents/Journal.cs	53% <ø> (ø)
Ical.Net/CalendarComponents/Todo.cs	66% <ø> (ø)
Ical.Net/CalendarProperty.cs	53% <100%> (-1%)	⬇️
Ical.Net/Collections/GroupedValueList.cs	89% <100%> (ø)
Ical.Net/Collections/ObjectEventArgs.cs	100% <ø> (ø)
Ical.Net/DataTypes/CalendarDataType.cs	48% <100%> (-1%)	⬇️
Ical.Net/CalendarComponents/CalendarEvent.cs	75% <83%> (+4%)	⬆️
Ical.Net/CalendarComponents/VTimeZone.cs	72% <50%> (-<1%)	⬇️
Ical.Net/Collections/MultiLinkedList.cs	0% <0%> (ø)
... and 11 more

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud