docs: Update and Complete Repository README File with Comprehensive Documentation (#344) [skip ci]

* docs: Complete comprehensive README update with all workflow documentation

Co-authored-by: samtrion <3283596+samtrion@users.noreply.github.com>

* fix: workflow references to use existing build-dotnet-single.yml

Co-authored-by: samtrion <3283596+samtrion@users.noreply.github.com>

* fix: Correct publish-nuget.yml parameter names to match actual implementation

Co-authored-by: samtrion <3283596+samtrion@users.noreply.github.com>

* fix: Mark parameters with defaults as optional for clarity

Co-authored-by: samtrion <3283596+samtrion@users.noreply.github.com>

* fix: Align parameter requirements with workflow definitions and clarify defaults

Co-authored-by: samtrion <3283596+samtrion@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: samtrion <3283596+samtrion@users.noreply.github.com>

Author: Copilot