Generate Screenplay from Marten and Critter Stack source

[woksin]

Summary

Extends cratis screenplay generate from Arc-only source analysis to built-in Arc, Marten, and Marten + Wolverine providers while preserving source-only, reproducible generation.

Added

• Add --provider auto|arc|marten|critter-stack with conservative source-framework detection.
• Generate verified Screenplay definitions from Marten and Critter Stack projects through the new official adapter package.
• Add a real package compatibility spec and end-to-end validation for Arc, BankAccountES, and canonical IncidentService source.

Changed

• Align Arc Screenplay, Screenplay, Stage, and Prologue packages on the current Screenplay 4 generation.
• Retain markerless non-spec projects for Critter Stack analysis while preserving Arc-specific project filtering.

[woksin]

Implementation and local end-to-end verification are complete. Keeping this draft until Cratis.Screenplay.Generation and Cratis.CritterStack.Screenplay 0.1.0 are available from nuget.org (tracked in Cratis/Screenplay.Generation#2 and Cratis/Screenplay.CritterStack#1). PR CI bootstraps the verified release assets only to validate this branch; the CLI release must consume the published packages.

[woksin]

All PR checks now pass, including the package-bootstrapped Release build and all 500 CLI specs plus 164 Chronicle integration specs. The first integration attempt hit a transient invalid fixture login; the failed job rerun passed. This remains draft solely until the upstream 0.1.0 packages are available from nuget.org.