Storybook: Add vision statement to intro page (#27228)

* Storybook: Add vision statement to intro page

Added the vision statement compiled by the Grafana Labs design system knights to the grafana-ui intro section. Feedback and further improvement ideas welcome!

* Review feedback part 1

_fixed headline formatting
_removed numbered list
_removed paragraph "A library of unified components and styles"
_renamed all occurrences to @grafana/ui
_replaced "ideate" with "determine together"

packages/grafana-ui/src/Intro.story.mdx

 <Meta title="Docs Overview/Intro" parameters={{ options: { isToolshown: false }, id: 1 }} />
 <Meta title="Docs Overview/Intro" parameters={{ options: { isToolshown: false }, id: 1 }} />
 
 
-# Grafana UI library
+# Grafana design system
 
 
 > **@grafana/ui is currently in BETA**.
 > **@grafana/ui is currently in BETA**.
 
 
-@grafana/ui is a collection of components used by [Grafana](https://github.com/grafana/grafana)
+With the design system @grafana/ui, we want to democratize development. This library of reusable [Grafana](https://github.com/grafana/grafana) components and guidelines helps you with contribution and plugin development.
 
 
-If you're a plugin developer, you can use these component to give your plugin an official look-and-feel.
+## Our vision
+Grafana Labs started @grafana/ui to make contributing to Grafana as easy as possible for Grafanistas and community members of all fields. We want to create a component library that results in:
+- Understanding of how each component works and how you can use it to create a great user experience. 
+- Short development times and consistent code quality.
+- A beautiful, visually consistent Grafana experience.
+- Transparency about how we work and what we do.
+
+### Maintained by Grafana Labs and you
+Grafana Labs has a task force that helps create and maintain components. We make sure that components are documented and easy to use. The current status of the @grafana/ui development is available on [GitHub](https://github.com/grafana/grafana/projects/26). Feel free to contribute!
+
+### How to get involved
+When we notice that we need to change something, we determine together what the change should be, then we put the change in place and communicate it publicly. Developers and designers create and improve @grafana/ui together. Throughout the process, we strive to involve you and meet your needs. We are looking forward to discussing your design and improvement ideas on [GitHub](https://github.com/grafana/grafana/projects/26). 
 
 
 ## Get started
 ## Get started