refactor: remove all legacy files

+ comment/delete things that haven't yet migrated to mantine

inertia/components/dashboard/dashboard_aside.tsx

@@ -0,0 +1,19 @@
+import { AppShell, Burger, Group, ScrollArea, Text } from '@mantine/core';
+import CollectionList from '~/components/dashboard/collection/list/collection_list';
+
+interface DashboardAsideProps {
+	isOpen: boolean;
+	toggle: () => void;
+}
+
+export const DashboardAside = ({ isOpen, toggle }: DashboardAsideProps) => (
+	<AppShell.Aside p="md">
+		<Group justify="space-between" hiddenFrom="md" mb="md">
+			<Text>Collections</Text>
+			<Burger opened={isOpen} onClick={toggle} hiddenFrom="md" size="md" />
+		</Group>
+		<AppShell.Section grow component={ScrollArea}>
+			<CollectionList />
+		</AppShell.Section>
+	</AppShell.Aside>
+);