CI Test

[hueifeng]

Testing CI workflow changes

[hueifeng]

@copilot review

[Copilot]

Pull request overview

This PR is focused on adjusting CI behavior and test execution stability, while also improving PDF native library loading (notably for macOS arm64) and adding test categorization for PDF-related tests.

Changes:

• Overhauled the GitHub Actions workflow into a multi-job CI with OS/framework matrix testing, artifacts, and an “alls-green” gate.
• Updated the test project to add GitHub Actions logging support, disable xUnit parallelism via xunit.runner.json, and adjust target frameworks (drop net7.0, add net9.0).
• Added PDF test categorization traits and introduced a DllImportResolver bootstrap to improve wkhtmltox native resolution.

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
.github/workflows/dotnetcore.yml	Reworked CI into change-detection + matrix test + final gate; adds log/artifact/diagnostic options.
src/Magicodes.ExporterAndImporter.Tests/xunit.runner.json	Disables parallel test collections and limits threads to 1 for more deterministic runs.
src/Magicodes.ExporterAndImporter.Tests/Magicodes.IE.Tests.csproj	Updates TFMs, adds GitHub Actions test logger package, and ensures xunit.runner.json is copied.
src/Magicodes.ExporterAndImporter.Tests/PdfExporter_Tests.cs	Tags PDF exporter tests with a Category trait.
src/Magicodes.ExporterAndImporter.Tests/MagicodesMiddleware_Tests.cs	Tags a PDF-related middleware test with a Category trait.
src/Magicodes.ExporterAndImporter.Tests/ExcelTemplateExporter_Tests.cs	Simplifies pre-delete logic for generated output files in two tests.
src/Magicodes.ExporterAndImporter.Pdf/PdfNativeLibraryBootstrapper.cs	Adds DllImportResolver registration to improve wkhtmltox native loading behavior and updates install guidance.
src/Magicodes.ExporterAndImporter.Pdf/PdfExporter.cs	Ensures native bootstrap executes before converter usage.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[hueifeng]

APPROVED