Add what's new section

Author: koperagen

README.md

@@ -37,6 +37,12 @@ You could find the following articles there:
     * [GroupBy operation](https://kotlin.github.io/dataframe/groupby.html)
 * [Rendering to HTML](https://kotlin.github.io/dataframe/tohtml.html#jupyter-notebooks)
 
+### What's new
+Check out new features in development for the next release in this [notebook](examples/notebooks/feature_overviews/0.14.0/new_features.ipynb)
+
+The DataFrame compiler plugin reached public preview state!
+Here's a [demo project](https://github.com/koperagen/df-plugin-demo) that works with IntelliJ IDEA 2024.2 Beta.
+
 ## Setup
 
 ```kotlin