Update CONTRIBUTING.md with dependency guidelines

Added guidelines for managing dependencies and packages.

Author: Alexandrbig1

CONTRIBUTING.md

@@ -68,6 +68,17 @@ We welcome contributions of all skill levels.
 
 ---
 
+## Dependencies & Packages
+- All dependencies are tracked in `package.json`.  
+- Please **do not install or commit new packages** without prior discussion.  
+- If you believe a new dependency is required:
+  1. Open or comment on an issue describing why it’s needed.  
+  2. Wait for maintainer approval before adding it.  
+- The `node_modules` folder should **not** be committed — it will be auto-generated by running `npm install`.  
+- Always run `npm install` after cloning the repo to ensure your local environment matches the project.  
+
+---
+
 ## Issues
 - Use issues to report bugs, request features, or ask questions  
 - Before opening a new issue, check if it already exists