add web visualizer (#314)

* add web visualizer

* fallback to simple model

* less samples, hopefully more efficient

* Use audiomotion analyzer

- Note: fixed to 4.1.1 because 4.2.0 uses esm which breaks in the current workflow...

* revert publish changes

* r2

* don't massively change package.json

* lazy

src/renderer/types.ts

@@ -235,3 +235,8 @@ export enum AuthState {
     LOADING = 'loading',
     VALID = 'valid',
 }
+
+export type WebAudio = {
+    context: AudioContext;
+    gain: GainNode;
+};