Merging and adjusting messaging interfaces

[ZKRobi]

Merged MessagingAdapter.Abstractions and Messaging.Abstractions
Adjusted Messaging interfaces to better suit the needs of ComposeUI (and specifically FDC3)

[lilla28]

[codecov]

Codecov Report

❌ Patch coverage is 53.93258% with 123 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.5%. Comparing base (ae83a75) to head (b4ac5a5).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...Stanley.ComposeUI.DesktopAgent/Fdc3DesktopAgent.cs	5.0%	19 Missing ⚠️
.../src/infrastructure/MessageRouterChannelFactory.ts	22.7%	17 Missing ⚠️
...cture/Internal/Fdc3DesktopAgentMessagingService.cs	68.2%	13 Missing ⚠️
src/shell/dotnet/src/Shell/App.xaml.cs	0.0%	11 Missing ⚠️
...net/src/Shell/Fdc3/ResolverUI/ResolverUIService.cs	60.0%	10 Missing ⚠️
...fdc3/src/infrastructure/ComposeUIPrivateChannel.ts	12.5%	7 Missing ⚠️
...src/MessageRouterAdapter/MessageRouterMessaging.cs	81.2%	5 Missing and 1 partial ⚠️
.../src/Abstractions/Exceptions/MessagingException.cs	0.0%	5 Missing ⚠️
...Stanley.ComposeUI.DesktopAgent/Channels/Channel.cs	76.4%	2 Missing and 2 partials ⚠️
....ComposeUI.DesktopAgent/Channels/PrivateChannel.cs	0.0%	4 Missing ⚠️
... and 10 more

❌ Your patch status has failed because the patch coverage (53.9%) is below the target coverage (100.0%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1053     +/-   ##
=======================================
- Coverage   65.8%   65.5%   -0.3%     
=======================================
  Files        343     338      -5     
  Lines      10061    9982     -79     
  Branches    1213    1212      -1     
=======================================
- Hits        6626    6548     -78     
+ Misses      3167    3165      -2     
- Partials     268     269      +1     

Files with missing lines	Coverage Δ
...nley.ComposeUI.DesktopAgent/Channels/AppChannel.cs	50.0% <100.0%> (ø)
...ley.ComposeUI.DesktopAgent/Channels/UserChannel.cs	100.0% <100.0%> (ø)
.../MorganStanley.ComposeUI.DesktopAgent/Fdc3Topic.cs	80.0% <100.0%> (+0.4%)	⬆️
...ctions/Exceptions/DuplicateServiceNameException.cs	0.0% <ø> (ø)
...DependencyInjection/ServiceCollectionExtensions.cs	100.0% <ø> (ø)
...essaging/dotnet/src/Core/Exceptions/ThrowHelper.cs	50.0% <ø> (+8.3%)	⬆️
src/messaging/dotnet/src/Core/InvokeOptions.cs	100.0% <ø> (ø)
src/messaging/dotnet/src/Core/MessageContext.cs	100.0% <ø> (ø)
...c/Core/Protocol/Messages/RegisterServiceRequest.cs	100.0% <ø> (ø)
src/messaging/dotnet/src/Core/PublishOptions.cs	100.0% <ø> (ø)
... and 21 more

... and 6 files with indirect coverage changes

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[lilla28]