feat: allow accounts with a quota of 0 GiB (#17413)

* Allow 0GiB quotas in user create/edit form, remove unused translations

* Make requireQuota check for null or 0

* Add unlimited quota change to the docs

* Fix user dto formatting

* Fix formating edit-user-form

* Regenerate open-api files

* Revert unnecessary i18n file changes

* Re-add newline en.json

* Resolve linting issues

* Fix formatting edit-user-form

* Re-add manifest

web/src/lib/components/forms/create-user-form.svelte

@@ -30,7 +30,7 @@
   let quotaSize: string | undefined = $state();
   let isCreatingUser = $state(false);
 
-  let quotaSizeInBytes = $derived(quotaSize ? convertToBytes(Number(quotaSize), ByteUnit.GiB) : null);
+  let quotaSizeInBytes = $derived(quotaSize === null ? null : convertToBytes(Number(quotaSize), ByteUnit.GiB));
   let quotaSizeWarning = $derived(
     quotaSizeInBytes && userInteraction.serverInfo && quotaSizeInBytes > userInteraction.serverInfo.diskSizeRaw,
   );
@@ -113,7 +113,7 @@
       </Field>
 
       <Field label={$t('admin.quota_size_gib')}>
-        <Input bind:value={quotaSize} type="number" min="0" />
+        <Input bind:value={quotaSize} type="number" placeholder={$t('unlimited')} min="0" />
         {#if quotaSizeWarning}
           <HelperText color="danger">{$t('errors.quota_higher_than_disk_size')}</HelperText>
         {/if}