docs: update README with usage example and dev guide

README.md

@@ -1,26 +1,103 @@
 # fca-redux
 
 > [!WARNING]
-> This project is currently **under development**. Features may be incomplete, and breaking changes can occur at any time.
+> This project is currently **under development**. Features may be incomplete, and breaking changes can occur at any time. Use with caution.
 
-A TypeScript rewrite of the Nero Facebook Client API.
+A modern, robust **TypeScript** rewrite of the Nero Facebook Client API (and its predecessors). This library allows you to programmatically interact with Facebook's private API to send messages, listen to events, and manage interactions.
 
 ## Features
-- Messaging (Send, Unsend, Mark as Read, Reactions)
-- MQTT Realtime Listener
-- User Information retrieval
-- Modern TypeScript implementation
-- Integrated Debugging & Logging
+
+- **Messaging**: Send text, attachments, stickers, and handle replies.
+- **Realtime**: MQTT-based listener for instant message reception.
+- **Reactions**: React to messages programmatically.
+- **User Info**: Retrieve detailed user profiles.
+- **Safety**: Unsend messages and manage thread settings.
+- **Developer Experience**:
+  - Full TypeScript support with type definitions.
+  - Integrated debugging and logging utilities.
+  - customizable options (User Agent, auto-reconnect, etc.).
 
 ## Installation
+
 ```bash
-npm install
+npm install fca-redux
 ```
 
-## Build
-```bash
-npm run build
+## Quick Start
+
+Here is a simple example of how to log in using an `appState` (cookies) and listen for incoming messages.
+
+```typescript
+import { login } from 'fca-redux';
+// Or: import fca from 'fca-redux';
+
+// Your 'appState.json' contains the cookies from a logged-in session.
+const credentials = {
+    appState: require('./appState.json') 
+};
+
+const options = {
+    listenEvents: true,
+    selfListen: false
+};
+
+login(credentials, options, (err, api) => {
+    if (err) {
+        console.error('Login failed:', err);
+        return;
+    }
+
+    console.log('Login successful!');
+
+    // simple echo bot example
+    api.listenMqtt((err, message) => {
+        if (err) return console.error(err);
+
+        if (message.type === 'message') {
+            api.sendMessage(`You said: ${message.body}`, message.threadID);
+        }
+    });
+});
 ```
 
+## Development
+
+To set up the project locally for development:
+
+1.  **Install dependencies:**
+    ```bash
+    npm install
+    ```
+
+2.  **Build the project:**
+    ```bash
+    npm run build
+    ```
+
+3.  **Linting:**
+    ```bash
+    npm run lint
+    ```
+
+4.  **Formatting:**
+    ```bash
+    npm run format
+    ```
+
+5.  **Run Tests:**
+    ```bash
+    npm test
+    ```
+
+## Contributing
+
+Contributions are welcome! Please fork the repository and submit a pull request.
+1.  Fork the repo.
+2.  Create your feature branch (`git checkout -b feature/amazing-feature`).
+3.  Commit your changes (`git commit -m 'Add some amazing feature'`).
+4.  Push to the branch (`git push origin feature/amazing-feature`).
+5.  Open a Pull Request.
+
 ## License
-MIT
+
+MIT © [0x3EF8](https://github.com/0x3EF8)