feat: reverse shares (#86)

* add first concept

* add reverse share funcionality to frontend

* allow creator to limit share expiration

* moved reverse share in seperate module

* add table to manage reverse shares

* delete complete share if reverse share was deleted

* optimize function names

* add db migration

* enable reverse share email notifications

* fix config variable descriptions

* fix migration for new installations

frontend/src/components/navBar/NavBar.tsx

@@ -1,4 +1,5 @@
 import {
+  ActionIcon,
   Box,
   Burger,
   Container,
@@ -13,10 +14,12 @@ import {
 import { useDisclosure } from "@mantine/hooks";
 import Link from "next/link";
 import { ReactNode, useEffect, useState } from "react";
+import { TbPlus } from "react-icons/tb";
 import useConfig from "../../hooks/config.hook";
 import useUser from "../../hooks/user.hook";
 import Logo from "../Logo";
 import ActionAvatar from "./ActionAvatar";
+import NavbarShareMenu from "./NavbarShareMenu";
 
 const HEADER_HEIGHT = 60;
 
@@ -117,6 +120,9 @@ const NavBar = () => {
       link: "/upload",
       label: "Upload",
     },
+    {
+      component: <NavbarShareMenu />,
+    },
     {
       component: <ActionAvatar />,
     },