chore: add README.md docs

Author: Stringsaeed

.github/images/icon.png

@@ -1,29 +1,81 @@
 # react-native-notifications-utils
-notifications utils
+
+A simple package for notifications utils.
+
+![Bell Illustration](.github/images/icon.png)
+
+## Features
+- [X] Opening App Notifications Settings for Android and iOS
+- [X] Typescript
+
+
 ## Installation
+---
+```sh
+yarn add react-native-notifications-utils
+```
+
+### iOS
 
 ```sh
-npm install react-native-notifications-utils
+cd ios && pod install
 ```
 
+
 ## Usage
+---
 
-```js
-import { multiply } from "react-native-notifications-utils";
+```typescript
+import NotificationsUtils from "react-native-notifications-utils";
 
 // ...
 
-const result = await multiply(3, 7);
+NotificationsUtils.openSettings();
 ```
 
+## API
+---
+
+### `openSettings(channelId?: string)`
+ API used to open the Platform specific System settings for the application.
+
+| Parameter | Type     | Description                                                                                 | Android | iOS |
+| --------- | -------- | ------------------------------------------------------------------------------------------- | ------- | --- |
+| channelId | `string` | The channel id to open the settings for. If not provided, the default channel will be used. | ✅       | ❌   |
+
+- On Android:
+  - API version is >= 26 with `channelId` will open the channel settings. if `channelI` is not provided, the app's notification settings will be opened.
+  - API version is < 26, the application settings screen is opened
+
+- On iOS:
+  - If the version of iOS is >= 15.4, the app's  notification settings screen is displayed.
+  - If the version of iOS is < 15.4, the app's settings screen is displayed.
+  - for further details, see:
+    - [Apple's iOS 16 documentation for `openNotificationSettingsURLString`]( https://developer.apple.com/documentation/uikit/uiapplication/4013180-opennotificationsettingsurlstrin)
+    - [Apple's iOS 15.4 documentation for `UIApplicationOpenNotificationSettingsURLString`](https://developer.apple.com/documentation/uikit/uiapplicationopennotificationsettingsurlstring)
+    - [Apple's documentation for `openSettingsURLString`](https://developer.apple.com/documentation/uikit/uiapplication/1623042-opensettingsurlstring).
 ## Contributing
 
 See the [contributing guide](CONTRIBUTING.md) to learn how to contribute to the repository and the development workflow.
 
+## Author
+___
+ - [**@stringsaeed**](https://www.github.com/stringsaeed)
+
+
 ## License
+---
 
 MIT
 
+
+
+### TODO:
+---
+- [ ] Add tests
+- [ ] Add support for request permissions
+- [ ] Keeps updated with new native features
+
 ---
 
 Made with [create-react-native-library](https://github.com/callstack/react-native-builder-bob)