feat(entities-shared): create shared empty state component [KHCP-14355]

[mptap]

Summary

Addresses https://konghq.atlassian.net/browse/KHCP-14355

Creates a shared EntityEmptyState component to be consumed across MFEs in Konnect for L1 items for Milestone 1, then later L1 items for Milestone 2, and potentially in Kong Manager.

Figma: https://www.figma.com/design/5mULvzeW8c3QhGpJvh01wW/Empty-States?node-id=3048-26260&t=KlU5OLVAeTcfHWy9-1

[kongponents-bot]

Preview components from this PR in consuming application

In consuming application project install preview versions of shared packages generated by this PR:

@kong-ui-public/entities-shared@pr-1850
@kong-ui-public/dashboard-renderer@pr-1850
@kong-ui-public/documentation@pr-1850
@kong-ui-public/tracing@pr-1850
@kong-ui-public/entities-certificates@pr-1850
@kong-ui-public/entities-consumer-credentials@pr-1850
@kong-ui-public/entities-consumer-groups@pr-1850
@kong-ui-public/entities-consumers@pr-1850
@kong-ui-public/entities-data-plane-nodes@pr-1850
@kong-ui-public/entities-gateway-services@pr-1850
@kong-ui-public/entities-key-sets@pr-1850
@kong-ui-public/entities-keys@pr-1850
@kong-ui-public/entities-routes@pr-1850
@kong-ui-public/entities-snis@pr-1850
@kong-ui-public/entities-upstreams-targets@pr-1850
@kong-ui-public/entities-vaults@pr-1850
@kong-ui-public/entities-plugins@pr-1850