MASSIVE commit

- moved to typescript

- axios rate limitmodule is busted, removed for now, do something else for that

- sequelize-typescript

- dotenv, not dotenv-flow

- removed playlist details route

types for API

ton of minor fixes and improvements

types/express-session.d.ts

@@ -0,0 +1,14 @@
+import type { AxiosRequestHeaders } from "axios";
+import type { User } from "spotify_manager/index.d.ts";
+
+declare module "express-session" {
+  // added properties
+  interface SessionData {
+    accessToken: string;
+    refreshToken: string;
+    authHeaders: AxiosRequestHeaders;
+    user: User;
+  }
+}
+
+export {};