docs: add more mentions of other possible styling themes

README.md

@@ -35,6 +35,14 @@ Refer to the **[Docs - Quick Start](https://ghiscoding.gitbook.io/slickgrid-reac
 | 3.x               |        | [Migration 3.x](https://github.com/ghiscoding/slickgrid-react/wiki/Migration-to-3.x)     | removal of jQuery (now uses browser native code), requires Slickgrid-Universal [3.x](https://github.com/ghiscoding/slickgrid-universal/releases/tag/v3.0.0) |
 | 2.x               | React 18+       | [Migration 2.x](https://github.com/ghiscoding/slickgrid-react/wiki/Migration-to-2.x)     | removal of jQueryUI, requires Slickgrid-Universal [2.x](https://github.com/ghiscoding/slickgrid-universal/releases/tag/v2.0.0) version |
 
+### Styling Themes
+
+Multiple styling themes are available
+- Bootstrap (see all Slickgrid-React [live demos](https://ghiscoding.github.io/slickgrid-react/))
+- Material (see [Slickgrid-Universal](https://ghiscoding.github.io/slickgrid-universal/#/example07))
+- Salesforce (see [Slickgrid-Universal](https://ghiscoding.github.io/slickgrid-universal/#/example16))
+
+Also note that all of these themes also have **Dark Theme** equivalent and even though Bootstrap if often used as the default, it also works well with any other UI framework like Bulma, Material, ...
 
 ### Live Demo page
 `Slickgrid-React` works with all `Bootstrap` versions, you can see a demo of each one below. It also works well with any other frameworks like Material or Bulma and there are also couple of extra styling themes based on Material & Salesforce which are also available. You can also use different SVG icons, you may want to look at the [Docs - SVG Icons](https://ghiscoding.gitbook.io/slickgrid-react/styling/svg-icons)