feat(integrations): add turso Stripe catalog provider

[snowmead]

Summary

• Adds the turso 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 hermetic tests; credential output names are provisional until discover, which is the documented wave posture.

Overview
Adds a Turso Phase 1 catalog integration for turso/database: managed CatalogResource with required location and name, outputs database_url and auth_token (provisional OUTPUT_FIELDS until mise run discover), plus catalog gap and hermetic provision tests. Wires it through register_providers!, pub mod turso, and the shared assert_outputs_match test for TursoDatabase.

Also extends stackless-provider-sdk with optional/required boolean and integer config helpers for upcoming generated catalog modules, documents catalog-first waves (PROVIDER-WAVES.md, DECISIONS.md, link from ADDING-A-PROVIDER.md), and adds scripts/generate_catalog_integrations.py to scaffold remaining deployables.

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