chore: update package versions

[HandyS11]

This pull request includes several improvements and updates, primarily focused on dependency updates, a refactor of the Tarjan strongly connected components algorithm, and minor test code cleanup. The most significant changes are outlined below.

Dependency Updates

• Updated multiple NuGet package versions in Directory.Packages.props, including Microsoft.Build, Microsoft.CodeAnalysis.CSharp, Microsoft.EntityFrameworkCore, and related libraries to their latest patch or minor versions.
• Updated the .NET SDK version in global.json from 10.0.103 to 10.0.200.

Tarjan Algorithm Refactor

• Refactored the iterative implementation of Tarjan's strongly connected components algorithm in TarjanSccAlgorithm.cs:
  • Extracted neighbor-pushing logic into a new helper method TryPushNeighbor, improving readability and maintainability. [1] [2] [3]
  • Moved the SCC collection logic into a dedicated CollectSccComponent method, further clarifying responsibilities within the algorithm.
  • Cleaned up redundant or now-unnecessary code related to stack frame and lowlink updates.

Test Code Cleanup

• Simplified array initialization in a unit test by replacing Array.Empty<string>() with the shorthand [] in NullOutputConsoleTests.cs.

[Copilot]

Pull request overview

This PR updates repository dependencies/.NET SDK, and refactors the iterative Tarjan SCC implementation to improve readability by extracting helper methods, with a small unit test cleanup.

Changes:

• Bumped .NET SDK in global.json and updated multiple centrally-managed NuGet package versions.
• Refactored TarjanSccAlgorithm by extracting neighbor traversal and SCC collection into dedicated helpers.
• Simplified an empty array argument in NullOutputConsoleTests.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
tests/ProjGraph.Tests.Unit.Core/NullOutputConsoleTests.cs	Minor test cleanup using collection expression for empty choices.
src/ProjGraph.Lib.Core/Domain/Algorithms/TarjanSccAlgorithm.cs	Refactor of iterative Tarjan SCC logic into helper methods for readability/maintainability.
global.json	Updates pinned .NET SDK version to 10.0.200.
Directory.Packages.props	Central package version bumps for build tooling, Roslyn, EF Core, and Microsoft.Extensions.* packages.

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