feat: default EmptyTableState elevation to overlay

[tmccoy14]

Summary

Changes the default elevation of EmptyTableState from raised to overlay. The raised elevation made the icon background effectively invisible in dark mode and very hard to see in light mode, so overlay is now the default to ensure the empty-state icon reads clearly against the surface it sits on.

Changes

• EmptyTableState default elevation → overlay (was raised)
• Docs updated to match: prose, prop table default, and examples (the elevation example now passes raised explicitly to demonstrate overriding the default)
• Version bump → 2.1.5

Notes

This changes the default rendering of EmptyTableState for any consumer not explicitly setting elevation. Consumers relying on the previous raised default can restore it by passing elevation="raised".

Before:

After:

[Copilot]

Pull request overview

Updates EmptyTableState to use a more legible default icon-background elevation (overlay) so the empty-state icon reads correctly across light/dark surfaces, and aligns the documentation and package version accordingly.

Changes:

• Changed EmptyTableState default elevation from raised → overlay.
• Updated the component docs to reflect the new default and adjusted the elevation example to explicitly pass raised.
• Bumped @eqtylab/equality package version to 2.1.5.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
packages/ui/src/components/empty-table-state/empty-table-state.tsx	Switches the component’s default elevation to ELEVATION.OVERLAY.
packages/demo/src/content/components/empty-table-state.mdx	Updates docs prose, examples, and prop table default to match the new behavior.
packages/ui/package.json	Version bump to 2.1.5 for publishing the change.

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