refactor: remove all legacy files

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

inertia/pages/collections/edit.tsx

@@ -2,7 +2,7 @@ import { useForm } from '@inertiajs/react';
 import { route } from '@izzyjs/route/client';
 import { useMemo } from 'react';
 import { useTranslation } from 'react-i18next';
-import FormCollection, {
+import MantineFormCollection, {
 	FormCollectionData,
 } from '~/components/form/form_collection';
 import { Collection } from '~/types/app';
@@ -37,8 +37,9 @@ export default function EditCollectionPage({
 	};
 
 	return (
-		<FormCollection
+		<MantineFormCollection
 			title={t('collection.edit')}
+			textSubmitButton={t('form.update')}
 			canSubmit={canSubmit}
 			data={data}
 			setData={setData}