Added NeMo Guardrails Chat component (#3331)

* added: nemoguardrails chat component

* fix: removed options argument from init

fix: generation text has been updated with content string

* fix: lint error fixed

* fix: error when get content

* fix: lint errors

* updated: added handleLLMNewToken for ChatNemoGuardrails

---------

Co-authored-by: patrick <patrick.alves@br.experian.com>

packages/components/nodes/chatmodels/ChatNemoGuardrails/readme.md

@@ -0,0 +1,18 @@
+Parameters:
+
+config_id
+baseUrl
+
+```
+/v1/chat/completions
+```
+
+```json
+{
+    "config_id": "bedrock",
+    "messages": [{
+      "role":"user",
+      "content":"Hello! What can you do for me?"
+    }]
+}
+```