Add typed generation kernel and finite catalog

[kattsushi]

Requested outcome

Add the schema-validated typed generation kernel and finite catalog required to compose reusable App Builder generators deterministically.

Expected behavior

• Decode RenderContext before any generator executes.
• Preserve finite AtomicGenerator<Input, Provides, Requires> capability relationships.
• Compose an explicitly closed catalog in deterministic dependency order.
• Reject unknown capabilities, cycles, duplicate generator IDs, output paths, and owners.
• Prevent post-construction mutation from changing the finite capability graph.
• Reject unsafe package roots before generator execution.

Acceptance evidence

• Generation package tests pass 23/23.
• Contracts tests pass 67/67.
• Generation typecheck and format checks pass.
• Scoped remediation validator passes.
• Total work unit remains at 398 changed lines.

Scope

This is Delivery Unit 2 of #131. Workspace/package surfaces, CLI/Nx adapters, Todo renderers, migration/parity, public E2E, and the PR #130 eligibility gate remain separate units.

[kattsushi]

Closing as not planned because Effectify App Builder has been retired in favor of contributing to lloydrichards/stack-effect. No App Builder implementation is retained on dev.