chore: add project dependencies and configuration files

Initial setup of project dependencies including axios, express, dotenv, and other supporting packages. Added configuration files and documentation for project setup and usage.

package.json

@@ -0,0 +1,16 @@
+{
+  "name": "bella-ai-assistant",
+  "version": "1.0.0",
+  "description": "A multi-provider AI assistant backend for Bella.",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "axios": "^1.6.0",
+    "body-parser": "^1.20.2",
+    "cors": "^2.8.5",
+    "dotenv": "^16.3.1",
+    "express": "^4.18.2"
+  }
+}