Add more ways for funnel publishing consumers registration

[Dragemil]

Particularly useful when we already have proper topics configured in the leanpipe builder, and don't want to duplicate this logic while registering funnelled app topic consumers.

[github-actions]

Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
71	71	0	0	0	0	17.8s

_{🎉 No failed tests in this run. | ⏭️ No skipped tests in this run.}

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.31%. Comparing base (b59b298) to head (de64993).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #82      +/-   ##
==========================================
+ Coverage   90.09%   90.31%   +0.22%     
==========================================
  Files          34       34              
  Lines         747      764      +17     
  Branches       46       46              
==========================================
+ Hits          673      690      +17     
  Misses         71       71              
  Partials        3        3              

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[Copilot]

Pull request overview

This PR enhances the funnel publishing consumer registration API by adding convenient overload methods and enabling fluent method chaining. The changes allow developers to reuse topics already configured in a LeanPipe builder without duplicating configuration logic.

• Added two new overload methods for AddFunnelledLeanPipeConsumers accepting TypesCatalog and LeanPipeServicesBuilder parameters
• Changed method return types from void to their respective interface types to enable fluent method chaining
• Exposed the Topics property on LeanPipeServicesBuilder as public with a private setter

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
publisher/src/LeanCode.Pipe/Extensions/LeanPipeServiceCollectionExtensions.cs	Exposes the Topics property as public to enable access by new registration overloads
publisher/src/Funnel/Publishing/RegistrationConfiguratorExtensions.cs	Adds two new overloads for AddFunnelledLeanPipeConsumers accepting TypesCatalog and LeanPipeServicesBuilder, changes return type to IRegistrationConfigurator for fluent chaining
publisher/src/Funnel/Instance/ServiceCollectionExtensions.cs	Changes AddLeanPipeFunnel return type from void to IServiceCollection for fluent chaining
publisher/src/Funnel/Instance/RegistrationConfiguratorExtensions.cs	Changes ConfigureLeanPipeFunnelConsumers return type from void to IRegistrationConfigurator for fluent chaining
publisher/test/Funnel.Tests/LeanCode.Pipe.Funnel.Tests/Publishing/RegistrationConfiguratorExtensionsTests.cs	Adds test coverage for the two new overload methods

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[mishioo]

I think it would be good to explain in the docstrings here when one might want to use each of those AddFunnelledLeanPipeConsumers overloads

[Dragemil]

Added a note that hints what is the default overload