chore: add init command , add README.md file for cli usage

Author: AndrewAminInstabug

bin/README.md

@@ -0,0 +1,96 @@
+# Instabug Flutter CLI Tool
+
+A command-line tool for managing Instabug Flutter SDK integration and utilities.
+
+## Available Commands
+
+### `init` - Initialize Instabug Flutter SDK
+
+Automatically sets up the Instabug Flutter SDK in your project with basic instrumentation.
+
+#### Usage
+
+```bash
+dart run instabug_flutter:instabug init --token YOUR_APP_TOKEN [options]
+```
+
+#### Options
+
+- `--token, -t` (required): Your Instabug app token
+- `--project-path, -p`: Path to your Flutter project (defaults to current directory)
+- `--invocation-events, -i`: Comma-separated list of invocation events (default: shake)
+  - Available events: `shake`, `floating_button`, `screenshot`, `two_finger_swipe_left`, `none`
+- `--setup-permissions`: Setup required permissions for iOS and Android (default: true)
+- `--update-pubspec`: Add instabug_flutter dependency to pubspec.yaml (default: true)
+- `--help, -h`: Show help message
+
+#### What it does
+
+1. **Updates pubspec.yaml**: Automatically fetches and adds the latest `instabug_flutter` dependency from pub.dev
+2. **Updates main.dart**: Adds the Instabug import and initialization code in the `main()` function before `runApp()`
+3. **Sets up permissions**: 
+   - **iOS**: Adds required usage descriptions to Info.plist for microphone and photo library access
+   - **Android**: Permissions are automatically handled by the plugin
+4. **Configures invocation events**: Sets up how users can invoke Instabug (shake, floating button, etc.)
+5. **Latest version detection**: Automatically fetches the most recent version from pub.dev with fallback support
+
+#### Examples
+
+**Basic initialization with shake gesture:**
+```bash
+dart run instabug_flutter:instabug init --token YOUR_APP_TOKEN
+```
+
+**Initialize with multiple invocation events:**
+```bash
+dart run instabug_flutter:instabug init --token YOUR_APP_TOKEN --invocation-events shake,floating_button
+```
+
+**Initialize without automatic permission setup:**
+```bash
+dart run instabug_flutter:instabug init --token YOUR_APP_TOKEN --no-setup-permissions
+```
+
+**Initialize for a specific project path:**
+```bash
+dart run instabug_flutter:instabug init --token YOUR_APP_TOKEN --project-path /path/to/my/flutter/project
+```
+
+#### After running the command
+
+1. Run `flutter packages get` to install the new dependency
+2. If using a placeholder token, replace `YOUR_APP_TOKEN` in your main.dart with your actual Instabug app token
+3. Test the integration by using your configured invocation event (e.g., shake the device)
+
+#### Finding your App Token
+
+You can find your app token by:
+1. Going to your [Instabug dashboard](https://dashboard.instabug.com)
+2. Selecting **SDK Integration** in the **Settings** menu
+3. Your app token will be displayed there
+
+### `upload-so-files` - Upload Symbol Files
+
+Uploads .so files for NDK crash reporting (existing command).
+
+## Getting Help
+
+For help on any command:
+```bash
+dart run instabug_flutter:instabug <command> --help
+```
+
+For general help:
+```bash
+dart run instabug_flutter:instabug --help
+```
+
+## Requirements
+
+- Flutter SDK
+- Dart SDK
+- Valid Instabug app token
+
+## Documentation
+
+For more detailed information about Instabug Flutter integration, visit the [official documentation](https://docs.instabug.com/docs/flutter-integration).