refactor: folders/files to group dsp logic

src/App.tsx

@@ -1,6 +1,6 @@
-import { useState, useEffect, useRef, useMemo } from 'react';
+import { useState, useEffect, useRef } from 'react';
 import './App.css';
-import { DSP, AppPage } from './types/types';
+import { DSP, AppPage } from './types';
 import TopBar from './components/Topbar/Topbar';
 import DSPPage from './pages/DspPage/DspPage';
 import AddDSPForm from './pages/AddDspPage/AddDspPage';