chore(workflows): simplify Copilot setup steps workflow triggers

[katriendg]

Description

Streamlined the copilot-setup-steps.yml workflow configuration based on MAUI team guidance and official GitHub documentation. The workflow now uses only workflow_dispatch for manual validation, aligning with how Copilot coding agent internally executes setup steps (not through visible workflow triggers).

Added resilience improvement: continue-on-error: true on the npm dependency installation step allows Copilot to start work even when dependencies fail, enabling it to fix package.json or package-lock.json issues itself.

Related Issue(s)

Closes #411

Type of Change

Select all that apply:

Code & Documentation:

• Bug fix (non-breaking change fixing an issue)
• New feature (non-breaking change adding functionality)
• Breaking change (fix or feature causing existing functionality to change)
• Documentation update

Infrastructure & Configuration:

• GitHub Actions workflow
• Linting configuration (markdown, PowerShell, etc.)
• Security configuration
• DevContainer configuration
• Dependency update

AI Artifacts:

• Reviewed contribution with prompt-builder agent and addressed all feedback
• Copilot instructions (.github/instructions/*.instructions.md)
• Copilot prompt (.github/prompts/*.prompt.md)
• Copilot agent (.github/agents/*.agent.md)

Other:

• Script/automation (.ps1, .sh, .py)
• Other (please describe):

Sample Prompts (for AI Artifact Contributions)

N/A - Infrastructure change only.

Testing

• Verified workflow file syntax is valid YAML
• Manual dispatch trigger can be used to validate setup steps work correctly
• Copilot session logs will show setup steps execution when agent starts work

Checklist

Required Checks

• Documentation is updated (if applicable)
• Files follow existing naming conventions
• Changes are backwards compatible (if applicable)
• Tests added for new functionality (if applicable)

AI Artifact Contributions

N/A - Not an AI artifact contribution.

Required Automated Checks

The following validation commands must pass before merging:

• Markdown linting: npm run lint:md
• Spell checking: npm run spell-check
• Frontmatter validation: npm run lint:frontmatter
• Link validation: npm run lint:md-links
• PowerShell analysis: npm run lint:ps

Security Considerations

• This PR does not contain any sensitive or NDA information
• Any new dependencies have been reviewed for security issues
• Security-related scripts follow the principle of least privilege

Additional Notes

Reference sources for these changes:

• MAUI team Copilot tips - Guidance on continue-on-error and workflow structure
• GitHub Docs: Customizing the development environment - Official specification

🔧 - Generated by Copilot

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.93%. Comparing base (292ef51) to head (b1a63be).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #414      +/-   ##
==========================================
- Coverage   60.96%   60.93%   -0.04%     
==========================================
  Files          19       19              
  Lines        3233     3233              
==========================================
- Hits         1971     1970       -1     
- Misses       1262     1263       +1     

Flag	Coverage Δ
pester	60.93% <ø> (-0.04%)	⬇️

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see 1 file with indirect coverage changes

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[Copilot]

Pull request overview

This PR streamlines the copilot-setup-steps.yml workflow configuration to better align with how GitHub Copilot coding agent internally uses setup steps. The workflow is changed from auto-running on pushes/PRs to being manually dispatchable only, and npm dependency installation is made more resilient.

Changes:

• Removed push and pull_request triggers that caused unnecessary workflow runs when the file changed
• Added continue-on-error: true to npm ci step to allow Copilot to start even if dependencies fail
• Updated comments to clarify workflow purpose and usage