docs(readme): update README and add banner (#113)

Author: dreyfus92

README.md

@@ -1,10 +1,39 @@
 # @e18e/cli
 
-This is currently a very early work in progress repository for tracking
-the new [e18e](https://e18e.dev) CLI.
+![hero](./public/banner.png)
 
-**Nothing usable exists here yet.**
+The e18e CLI is a tool for analyzing and optimizing your JS/TS projects. It helps you identify performance issues, find optimization opportunities, and automatically migrate to suggested dependencies.
+
+> [!IMPORTANT]
+> This project is still in early development and we are actively working on it. If you encounter any issues or have ideas for new features, please let us know by [opening an issue](https://github.com/e18e/cli/issues/new/choose) on our GitHub repository.
+>
+
+## Quick Start
+
+```sh
+// Install and run analysis
+npx @e18e/cli analyze
+
+// Migrate packages interactively
+npx @e18e/cli migrate --interactive
+```
+
+## Installation
+
+You can install the e18e CLI globablly or use it with npx:
+
+```sh
+npm install -g @e18e/cli
+```
+
+## Learn more
+
+You can learn more about the CLI by going through the [documentation](https://e18e.dev/docs/cli/).
+
+## Contributing
+
+We're happy you'd like to get involved! Please join our [Discord](https://chat.e18e.dev) server to discuss with others.
 
 ## License
 
-MIT
+MIT License @2025 - Present e18e contributors.