Add workspace surfaces and generic generation adapters

[kattsushi]

Requested outcome

Add exclusive workspace/package generation surfaces and real generic CLI/Nx planning adapters over the typed kernel.

Expected behavior

• One workspace generator owns exactly the five root workspace files.
• One package generator owns every selected package manifest and src/index.ts barrel.
• Workspace name, npm scope, package identities, names, and roots come from validated RenderContext.
• CLI and Nx expose package-owned adapter functions that invoke the same catalog composition authority.
• Adapter output deep-equals direct generation output and no adapter fabricates files or owns surfaces.

Acceptance evidence

• Contracts 67/67, generation 24/24, CLI 9/9, and Nx 7/7 pass.
• Generation, CLI, and Nx typechecks pass.
• Format, diff, and scoped code validation pass.
• Total work unit is 391 changed lines.

Scope

This is Delivery Unit 3 of #131. Todo renderers, frozen parity/migration, 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.