Adds `RichTextAreaDemo` to the gradle build as a part of the `apps` target.
Places `RichEditorDemo.jar` into `apps/samples/RichEditorDemo/dist` . --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - added to gradle build Changes: https://git.openjdk.org/jfx/pull/2149/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2149&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8382175 Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jfx/pull/2149.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2149/head:pull/2149 PR: https://git.openjdk.org/jfx/pull/2149
