feat(SPA): schema list and the sidebar Content group

web/src/components/SchemaEmpty.vue

@@ -0,0 +1,30 @@
+<script setup lang="ts">
+import { t } from '@/i18n'
+
+const emit = defineEmits<{ create: [] }>()
+</script>
+
+<template>
+	<UEmpty
+		variant="naked"
+		icon="i-lucide-shapes"
+		:title="t('No content types yet')"
+		:description="
+			t(
+				'Create a content type to manage your own kind of content, like events or recipes. The built-in types stay as they are.',
+			)
+		"
+		:ui="{
+			root: 'gap-3 border border-default bg-default px-6 py-10 sm:px-6 sm:py-10 lg:px-6 lg:py-10',
+			avatar: 'mb-0 size-11 rounded-none bg-elevated text-toned',
+			title: 'text-md/7 font-semibold',
+			description: 'max-w-90 text-muted text-pretty',
+		}"
+	>
+		<template #actions>
+			<UButton icon="i-lucide-plus" class="h-8 px-4 max-md:h-11" @click="emit('create')">
+				{{ t('New content type') }}
+			</UButton>
+		</template>
+	</UEmpty>
+</template>