feat(integrations): add workos Stripe catalog provider

[snowmead]

Summary

• Adds the workos Stripe Projects catalog integration family as CatalogResource adapter(s).
• Follows docs/ADDING-A-PROVIDER.md and docs/PROVIDER-WAVES.md.
• Includes gap test + hermetic provision test. OUTPUT_FIELDS provisional until mise run discover.

Test plan

• Gap + hermetic tests in module
• Live mise run discover when provider is linked
• Merge after resolving additive registry.rs conflict with other family PRs

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Note

Low Risk
Additive integration and SDK helpers with offline tests; credential output names are provisional until discover, which could affect first live provision only.

Overview
Introduces WorkOS as a Phase 1 Stripe Projects catalog integration: workos/auth is a managed, global-only CatalogResource exposing api_key and client_id, with optional environment defaulting to sandbox, registered as integration-workos. Gap and hermetic provision tests follow the existing Cloudflare pattern; OUTPUT_FIELDS stay provisional until mise run discover.

Also extends stackless-provider-sdk with optional/required boolean and optional integer config readers for generated catalog modules, documents catalog-first waves in PROVIDER-WAVES.md / DECISIONS.md, links that from ADDING-A-PROVIDER.md, and adds scripts/generate_catalog_integrations.py to scaffold remaining deployables. Provider output-drift test commentary in providers/mod.rs is trimmed and WorkOSAuth is included in the outputs lockstep test.

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