chore(text-recognition): README update (#39)

Author: Ombuweb

packages/mlkit-text-recognition/README.md

@@ -1,12 +1,88 @@
 # @nativescript/mlkit-text-recognition
 
-```javascript
+A plugin used with [@nativescript/mlkit-core](../mlkit-core) to enable Text Recognition in your app and provide [TextResult](#textresult) type for the text recognition event data.
+
+## Contents
+* [Installation](#installation)
+* [Use @nativescript/mlkit-text-recognition](#use-nativescriptmlkit-text-recognition)
+* [API](#api)
+    * [TextResult](#textresult)
+* [License](#license)
+
+## Installation
+
+```cli
 npm install @nativescript/mlkit-text-recognition
 ```
 
-## Usage
+## Use @nativescript/mlkit-text-recognition
+
+For an example, read [Use @nativescript/mlkit-core](../mlkit-core#use-nativescriptmlkit-core) and [Text Recognition](../mlkit-core#text-recognition).
+
+## API
+
+### TextResult
+
+The Text Recognition event data type.
+
+```ts
+interface TextResult {
+    text?: string
+    bounds: Bounds
+    lines: TextLine[]
+    points: Point[]
+}
+```
+---
+#### Point
+
+```ts
+interface Point {
+    x: number;
+    y: number;
+}
+```
+---
+#### Bounds
+```ts
+interface Bounds {
+    origin: Origin;
+    size: Size;
+}
+```
+#### Origin
+```ts
+interface Origin {
+    x: number;
+    y: number;
+}
+```
 
-See [@nativescript/mlkit-core](/packages/mlkit-core/README.md) Usage
+#### Size
+```ts
+interface Size {
+    width: number;
+    height: number;
+}
+```
+---
+#### TextLine
+```ts
+interface TextLine {
+    text?: string
+    bounds: Bounds
+    elements: TextElement[]
+    points?: Point[]
+}
+```
+#### TextElement
+```ts
+interface TextElement {
+    text?: string
+    bounds: Bounds
+}
+```
+---
 ## License
 
 Apache License Version 2.0