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()

examples/augmentations-zero-config.ts

@@ -23,7 +23,7 @@ async function main() {
   await brain.init()
   
   // Use Brainy normally - augmentations work transparently
-  await brain.addNoun("Hello world", 'Content', { type: "greeting" })
+  await brain.add({ data: "Hello world", type: 'content', metadata: { type: "greeting" } })
   
   // Batch operations automatically optimized
   await brain.addBatch([