Migrate cli utils to REST API (#239)

* Port a number of commands to use API gateway instead of Pulsar

* Ported tg-invoke-agent to websockets API

* Rename the 2 RAG commands: tg-query-... to tg-invoke-...

trustgraph-cli/scripts/tg-invoke-llm

@@ -8,15 +8,15 @@ and user prompt.  Both arguments are required.
 import argparse
 import os
 import json
-from trustgraph.clients.llm_client import LlmClient
+from trustgraph.api import Api
 
-default_pulsar_host = os.getenv("PULSAR_HOST", 'pulsar://localhost:6650')
+default_url = os.getenv("TRUSTGRAPH_URL", 'http://localhost:8088/')
 
-def query(pulsar_host, system, prompt):
+def query(url, system, prompt):
 
-    cli = LlmClient(pulsar_host=pulsar_host)
+    api = Api(url)
 
-    resp = cli.request(system=system, prompt=prompt)
+    resp = api.text_completion(system=system, prompt=prompt)
 
     print(resp)
 
@@ -28,9 +28,9 @@ def main():
     )
 
     parser.add_argument(
-        '-p', '--pulsar-host',
-        default=default_pulsar_host,
-        help=f'Pulsar host (default: {default_pulsar_host})',
+        '-u', '--url',
+        default=default_url,
+        help=f'API URL (default: {default_url})',
     )
 
     parser.add_argument(
@@ -50,7 +50,7 @@ def main():
     try:
 
         query(
-            pulsar_host=args.pulsar_host,
+            url=args.url,
             system=args.system[0],
             prompt=args.prompt[0],
         )