Combine and separate workflows

[softworkz]

• Separate between PR and Push execution (with and without secrets)
• Turn tests into re-usable workflows and call them from the main ones
• Introduce a random delay to avoid "npm gateway timeout errors"
• Add a workflow to re-run failed test jobs

[Copilot]

Pull request overview

This PR restructures the GitHub Actions workflows to separate PR validation from push/publish workflows, implements reusable workflow patterns, and adds automatic retry logic for flaky tests.

Key Changes:

• Split CI workflow into separate "PR Validation" and "Build and Publish" workflows with appropriate secret handling
• Converted integration tests and whitespace checks into reusable workflows called by main workflows
• Added automatic retry mechanism for failed integration test matrix jobs

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/ElectronNET.sln	Updated workflow file references to reflect new workflow names
.github/workflows/trailing-whitespace-check.yml	Converted to reusable workflow with workflow_call trigger
.github/workflows/retry-test-jobs.yml	New workflow to automatically rerun failed integration test jobs
.github/workflows/pr-comment.yml	Updated to reference renamed "PR Validation" workflow
.github/workflows/integration-tests.yml	Converted to reusable workflow and added random delay to prevent npm timeouts
.github/workflows/ci.yml	Renamed to "Build and Publish" and restructured to use reusable workflows
.github/workflows/PR Validation.yml	New workflow for PR validation that orchestrates whitespace checks, tests, and build

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[softworkz]

This gives a much nicer all-in-one view of all jobs that are run:

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And also less confusion on the Actions tab (after a while)

[FlorianRappl]

Great one! I'm not sure the delay fixes the issue, but it also can't hurt.

[softworkz]

I forgot to mention that I made this direct commit yesterday 33da428 - I don't want to do that normally, but it seemed trivial enough in that case.