Added new README.md for v4 of the app

v4x/README.md

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+# Tess4J Migrated from v3 to v4
+-----
+Note that all datasets were retrieved from <a href='https://github.com/tesseract-ocr/tessdata_best'>tessdata_best</a> since these datasets are not only high in accuracy but also re-trainable. A possible tool to train this can be found at <a href='https://github.com/tesseract-ocr/tesstrain'>tesstrain</a>
+
+## Preview of types of tessdata
+<img src='https://miro.medium.com/v2/resize:fit:4800/format:webp/1*uqFAG6o-7SPJF4-b2GDXpQ.png' width='600px' />
+
+### Running
+To run the application, simply ensure that `app/Tess4JOcrApp_v4x.jar` is located in the same folder as `tessdata`. Proceed to double-click it and application shall launch accordingly and display a popup window.
+
+### 👀 Preview
+<img src='https://miro.medium.com/v2/resize:fit:4800/format:webp/1*hbNpGG_2b8Lj82iYYkib0A.png' width="800px" />
+
+### ✍ Read related post here
+
+<a href='https://geek-cc.medium.com/migrating-ocr-native-application-developed-with-tesseract-java-wrapper-tess4j-from-v3-to-v4-390ed3f68e12'>Migrating OCR Native Application Developed With Tesseract Java Wrapper Tess4J — From V3 To V4</a>
+
+
+<p>— <b>Join me on 📝 <b>Medium</b> at <a href='https://medium.com/@geek-cc' target='_blank'>~ ξ(🎀˶❛◡❛) @geek-cc</a></b></p>
+
+---
+
+#### 🌮 Please buy me a <a href='https://www.buymeacoffee.com/geekcc' target='_blank'>Taco</a>! 😋