Additional a11y warnings to resolve

[endigo9740]

Current Behavior

We recently updated a number of components to silence a11y warnings provided in newer versions of Svelte. Most errors have been resolved, but it looks like we missed on for the AppRailAnchor

Expected Behavior

The error is due to the slew of events forwarded here:

https://github.com/skeletonlabs/skeleton/blob/master/packages/skeleton/src/lib/components/AppRail/AppRailAnchor.svelte#L53

We should either:

1. Remove the extraneous events
2. Set a proper aria role (per the error) - best guess would be button off-hand

Steps To Reproduce

The errors appear when starting a Skeleton app. Regardless if you use the AppRailAnchor or not.

Link to Reproduction / Stackblitz

No response

More Information

Please consult with me before making this change. We need to decided between the two options provided above.