feat: modernize API architecture and deprecation handling

- Modernize BrainyInterface to only contain current API methods (add, relate, find, get)
- Update all interface consumers to use modern API patterns
- Make Brainy class implement clean modernized interface
- Update CLI commands to use add() and relate() instead of deprecated methods
- Update all source code components to use modern API consistently
- Update examples and integration tests to modern patterns
- Improve architectural consistency across the entire codebase

BREAKING: BrainyInterface no longer contains deprecated methods
Migration: Use add() instead of addNoun(), relate() instead of addVerb()

src/neural/improvedNeuralAPI.ts

@@ -3285,7 +3285,7 @@ export class ImprovedNeuralAPI {
       if (clusters.length === 0) break
       
       try {
-        const noun = await this.brain.getNoun(itemId)
+        const noun = await this.brain.get(itemId)
         const itemVector = noun?.vector || []
         if (itemVector.length === 0) continue