Use Step Summary for release information instead of notices

[MariusStorhaug]

Context

The Process-PSModule workflow posts release information using GitHub Actions notices. Notices are useful for inline messages but are not well-suited for structured release reports that span multiple registries.

Request

Release information should be displayed using GitHub Actions Step Summary instead of notices. Step Summary provides a more structured and visually appealing output directly on the workflow run page.

What is expected

The workflow should produce a Step Summary with:

• A clear Release Report header
• A table showing releases across registries:

Registry	Status	Version	Link
GitHub	✅ Published	v1.0.0	Release
PowerShell Gallery	✅ Published	1.0.0	Package

• Release notes displayed below the table

Acceptance criteria

• Release information is rendered as a Step Summary on the workflow run page
• The summary includes a table with registry name, status, version, and link
• Release notes are displayed in the summary
• The summary is extensible for future registries (NuGet, Azure Artifacts, etc.)
• Failed or skipped publishes are indicated with appropriate status icons

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Technical decisions

To be determined during implementation planning.

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Implementation plan

• Identify where release notices are currently generated in the workflow
• Replace notice output with $GITHUB_STEP_SUMMARY markdown content
• Design the release report table format with registry, status, version, and link columns
• Include release notes section below the table
• Handle conditional rows based on which registries were actually published to
• Add error/skip status indicators for failed publishes
• Test with both single-registry and multi-registry publish scenarios

[MariusStorhaug]

Restructured issue description into the standard three-section format.

• Rewrote context and request with clear user-facing framing
• Added structured acceptance criteria
• Added placeholder technical decisions section
• Created implementation plan with 7 tasks covering output generation, table format, and conditional rendering
• Changed label from enhancement to Minor (new feature: Step Summary support)