Lancedb support (#6)

* add start of lanceDB support

* lancedb initial support

* add null method for deletion of documents from namespace since LanceDB does not support
show warning modal on frontend for this

* update .env.example and lancedb methods for sourcing

* change export method

* update readme

server/package.json

@@ -29,7 +29,8 @@
     "slugify": "^1.6.6",
     "sqlite": "^4.2.1",
     "sqlite3": "^5.1.6",
-    "uuid": "^9.0.0"
+    "uuid": "^9.0.0",
+    "vectordb": "0.1.5-beta"
   },
   "devDependencies": {
     "nodemon": "^2.0.22",