docs: add deprecation warnings for addNoun and addVerb methods

- Add @deprecated JSDoc tags to TypeScript definitions
- Update all documentation examples to use modern add() and relate() API
- Preserve batch operations (addNouns, addVerbs) as they remain current
- Mark deprecated methods in both source and compiled definitions

Migration guide:
- addNoun(data, type, metadata) → add(data, { nounType: type, ...metadata })
- addVerb(source, target, type, metadata) → relate(source, target, type, metadata)

docs/guides/enterprise-for-everyone.md

@@ -404,7 +404,7 @@ const brain = new BrainyData()
 await brain.init()
 
 // You're now running the same tech as Fortune 500 companies
-await brain.addNoun("Your data is enterprise-grade", {
+await brain.add("Your data is enterprise-grade", {
   secure: true,
   durable: true,
   scalable: true,