Integrate tdmcp builders into shared registries

Wire builders' tools into registries and CLI

Guarantee registry/CLI/docs coherence when multiple features land together

• · builders' tool files
• · layer index.ts
• · cli/agent.ts

• · updated registry/CLI
• · _workspace/03_integrate.md

• · git
• · npm run typecheck
• · npm run build

• · all builder files are green in isolation

• · shared file changed by another agent — reconcile instead of overwriting

• · stages by explicit path only
• · runs full build before declaring done