Added unit tests to TechnitiumLibrary.Net.Firewall

[zbalkan]

Relies on #29 getting merged.

[Copilot]

Pull request overview

This PR introduces unit testing infrastructure to the TechnitiumLibrary project by adding a new test project targeting the TechnitiumLibrary.Net.Firewall library. It also adds a GitHub Actions workflow to run these tests automatically.

Changes:

• Added a new MSTest-based unit test project (TechnitiumLibrary.UnitTests) with tests for WindowsFirewall class
• Configured GitHub Actions workflow for automated testing on Windows using MSBuild
• Updated README with a unit testing status badge

Reviewed changes

Copilot reviewed 6 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
TechnitiumLibrary.sln	Added the new UnitTests project to the solution with appropriate build configurations
TechnitiumLibrary.UnitTests/TechnitiumLibrary.UnitTests.csproj	New test project file configured with MSTest.Sdk 4.0.1 targeting .NET 9.0
TechnitiumLibrary.UnitTests/TechnitiumLibrary.Net.Firewall/WindowsFirewallTests.cs	Unit tests for WindowsFirewall class methods, testing error cases and basic functionality
TechnitiumLibrary.UnitTests/MSTestSettings.cs	Configures MSTest to run tests in parallel at method level
.github/workflows/unit-testing.yml	GitHub Actions workflow to build and test the solution on Windows
README.md	Added Quality Assurance section with unit testing badge
TechnitiumLibrary/CollectionExtensions.cs	Added missing newline at end of file
TechnitiumLibrary/Base32.cs	Added missing newline at end of file

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 8 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 8 changed files in this pull request and generated 1 comment.

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