fix: Move content into to frontend directory

Doing this BEFORE the merge prevents a lot of merge conflicts.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

frontend/src/components/editor-page/document-bar/permissions/permission-modal.tsx

@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import React from 'react'
+import { Modal } from 'react-bootstrap'
+import type { ModalVisibilityProps } from '../../../common/modals/common-modal'
+import { CommonModal } from '../../../common/modals/common-modal'
+import { PermissionSectionOwner } from './permission-section-owner'
+import { PermissionSectionUsers } from './permission-section-users'
+import { PermissionSectionSpecialGroups } from './permission-section-special-groups'
+
+/**
+ * Modal for viewing and managing the permissions of the note.
+ *
+ * @param show true to show the modal, false otherwise.
+ * @param onHide Callback that is fired when the modal is about to be closed.
+ */
+export const PermissionModal: React.FC<ModalVisibilityProps> = ({ show, onHide }) => {
+  return (
+    <CommonModal show={show} onHide={onHide} showCloseButton={true} title={'editor.modal.permissions.title'}>
+      <Modal.Body>
+        <PermissionSectionOwner />
+        <PermissionSectionUsers />
+        <PermissionSectionSpecialGroups />
+      </Modal.Body>
+    </CommonModal>
+  )
+}