Introduce C++ SDK component type

[grvillic]

We are experimenting with a new component type for C++ SDK version detection.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.2%. Comparing base (e2c9188) to head (40c55bf).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1626   +/-   ##
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  Coverage   90.2%   90.2%           
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  Files        437     439    +2     
  Lines      37801   37875   +74     
  Branches    2324    2331    +7     
=====================================
+ Hits       34121   34195   +74     
  Misses      3203    3203           
  Partials     477     477           

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[Copilot]

Pull request overview

This PR introduces a new CppSdk component type to support C++ SDK version detection. This is an experimental feature to expand Component Detection's capability to detect C++ SDK dependencies.

Changes:

• Added ComponentType.CppSdk enum value (20) to the component type enumeration
• Implemented CppSdkComponent class following established TypedComponent patterns with Name and Version properties
• Registered the new component type in TypedComponentMapping for serialization support
• Added comprehensive unit tests for CppSdkComponent covering constructor validation and PackageUrl generation
• Added serialization/deserialization test in TypedComponentSerializationTests

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
src/Microsoft.ComponentDetection.Contracts/TypedComponent/ComponentType.cs	Adds CppSdk enum value (20) to the ComponentType enumeration
src/Microsoft.ComponentDetection.Contracts/TypedComponent/CppSdkComponent.cs	Implements new CppSdkComponent class with Name/Version properties and PackageUrl generation using "generic" type with "cppsdk" qualifier
src/Microsoft.ComponentDetection.Contracts/BcdeModels/TypedComponentMapping.cs	Registers CppSdkComponent in the type discriminator mapping for serialization support
test/Microsoft.ComponentDetection.Contracts.Tests/CppSdkComponentTests.cs	Adds comprehensive unit tests for constructor validation, property initialization, and PackageUrl format
test/Microsoft.ComponentDetection.Contracts.Tests/TypedComponentSerializationTests.cs	Adds serialization/deserialization test for CppSdkComponent