chore: improve docs page performance by only showing default example (#…

…1898)

There is a noticeable lag on when typing into the input of the
[`OnyxInput`](https://storybook.onyx.schwarz/?path=/docs/form-input--docs).

### Cause
I am concluding that the issue lie with Storybook:
- I performed a cursory performance check using the Vue Dev Tools and
there are no apparent performance issues with our Vue components.
- The Storybook input elements are also affected

### Mitigation
I removed all, but the Default Story example from the docs page.
This should mitigate bigger lagging issues for now.

apps/docs/.storybook/main.ts

@@ -15,9 +15,6 @@ const config: StorybookConfig = {
   core: {
     disableTelemetry: true,
   },
-  docs: {
-    autodocs: true,
-  },
 };
 
 export default config;

packages/sit-onyx/.storybook/docs-template.mdx

@@ -22,9 +22,3 @@ Below you can find all available properties, events and slots of the component.
 
 <div style={{ marginTop: "3rem" }}></div>
 </section>
-
-## Examples
-
-_Below you can find various pre-defined variations of the component for different use cases._
-
-<Stories title="" />