📖 [Docs]: Process-PSModule runtime settings contract documentation updated

[Marius Storhaug (MariusStorhaug)]

Process-PSModule documentation now describes the current internal runtime settings contract in evergreen terms while keeping .github/PSModule.yml as the user-facing configuration source.

Changed: Pipeline stages runtime contract documentation

• Clarified that Plan enriches .github/PSModule.yml into an internal runtime Settings object shared between jobs.
• Documented the current phase-owned execution flags, test suite matrix locations, and publish resolution paths as the active contract.

Changed: Runtime settings reference style

• Replaced comparison-oriented wording with definitive runtime path documentation (Settings.*) and behavior-focused descriptions.
• Kept version stamping and release-decision references aligned with Settings.Publish.Module.Resolution.*.

Changed: Usage behavior wording

• Updated the important-file behavior section to state the current runtime values declaratively.

Technical Details

• Files updated:
  • src/docs/Frameworks/Process-PSModule/pipeline-stages.md
  • src/docs/Frameworks/Process-PSModule/usage.md
  • src/docs/Frameworks/Process-PSModule/configuration.md
• Change is documentation-only and aligned with the current Process-PSModule runtime contract.

Related links

• Upstream runtime contract context: ⚙️ [Maintenance]: Internalize runtime settings by phase PSModule/Process-PSModule#402