Feature/api gateway (#164)

* Bare bones API gateway
* Working for LLM + prompt
* RAG query works
* Triples query
* Added agent API
* Embeddings API
* Put API tests in a subdir

test-api/test-graph-rag-api

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+import requests
+import json
+import sys
+
+url = "http://localhost:8088/api/v1/"
+
+############################################################################
+
+input = {
+    "query": "Give me 10 facts",
+}
+
+resp = requests.post(
+    f"{url}graph-rag",
+    json=input,
+)
+
+resp = resp.json()
+
+print(resp)
+if "error" in resp:
+    print(f"Error: {resp['error']}")
+    sys.exit(1)
+
+print(resp["response"])
+
+sys.exit(0)
+############################################################################
+