Feat: save waveform as file (#118)

* package rpm

* cache waveform data as file in library

* clear waveform data in db

* fix some css

enjoy/src/types/enjoy-app.d.ts

@@ -205,4 +205,8 @@ type EnjoyAppType = {
     process: (params: any) => Promise<void>;
     update: (id: string, params: any) => Promise<void>;
   };
+  waveforms: {
+    find: (id: string) => Promise<WaveFormDataType>;
+    save: (id: string, data: WaveFormDataType) => Promise<void>;
+  };
 };

enjoy/src/types/waveform.d.ts

@@ -0,0 +1,6 @@
+type WaveFormDataType = {
+  peaks: number[];
+  sampleRate: number;
+  duration: number;
+  frequencies: number[];
+};