Add images to readme

Author: bobbylight

README.md

@@ -3,6 +3,7 @@
 ![Java Build](https://github.com/bobbylight/RSTAUI/actions/workflows/codeql-analysis.yml/badge.svg)
 ![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.fifesoft/rstaui/badge.svg)
 [![codecov](https://codecov.io/gh/bobbylight/RSTAUI/graph/badge.svg?token=fa8OfGn3RO)](https://codecov.io/gh/bobbylight/RSTAUI)
+![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.fifesoft/rstaui/badge.svg)
 
 This is a library for adding the following dialogs to an application using `RSyntaxTextArea` as an
 editor:
@@ -24,6 +25,18 @@ SNAPSHOT builds of the in-development, unreleased version are hosted on [Sonatyp
 RSTAUI is available under a [modified BSD license](https://github.com/bobbylight/RSTAUI/blob/master/RSTAUI/src/main/dist/RSTAUI.License.txt).
 For more information, visit [http://bobbylight.github.io/RSyntaxTextArea/](http://bobbylight.github.io/RSyntaxTextArea/).
 
+## Screenshots
+<p align="center" width="100%">
+  <img src="img/find-dialog.png"/>
+
+![find-dialog.png](img/find-dialog.png)                       
+
+![replace-dialog.png](img/replace-dialog.png)                    
+
+![go-to-line-dialog.png](img/go-to-line-dialog.png)                
+
+</p>
+
 ## Compiling
 
 RSTAUI is built using Gradle.  To compile the source, run all tests, and build the distribution jar,