feat: create BaseButton component (#1123)

Co-authored-by: Dominik Pschenitschni <mail@celement.de>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/1123
Reviewed-by: konrad <k@knt.li>
Co-authored-by: Dominik Pschenitschni <dpschen@noreply.kolaente.de>
Co-committed-by: Dominik Pschenitschni <dpschen@noreply.kolaente.de>

src/components/list/partials/filter-popup.vue

@@ -1,7 +1,7 @@
 <template>
 	<x-button
 		v-if="hasFilters"
-		type="secondary"
+		variant="secondary"
 		@click="clearFilters"
 	>
 		{{ $t('filters.clear') }}
@@ -10,7 +10,7 @@
 		<template #trigger="{toggle}">
 			<x-button
 				@click.prevent.stop="toggle()"
-				type="secondary"
+				variant="secondary"
 				icon="filter"
 			>
 				{{ $t('filters.title') }}