Also: fixes DialogContent/DialogFooter's close/action buttons to use our
actual Button variant set (secondary) instead of the CLI's default
ghost/outline variants, which don't exist on our re-themed Button.
Adds an eslint override so shadcn-vue's single-word ui/ component names
(Button.vue, Dialog.vue, ...) aren't flagged by vue/multi-word-component-names.
This was the last PrimeVue-wrapped component, so lib/index.ts no longer
imports anything from primevue or uses the ptThemeable helper.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>