setup electron multi-window architecture (#102)

* prototype with two windows

* use deps in separate window render process

* enhance autoplay into desktop overlay

* fix: autoplay window not applying tailwind styles

js/src/lib/autoplay-ipc.ts

@@ -0,0 +1,10 @@
+export interface AutoplayPayload {
+  particleId: string;
+  streamId: string;
+  networkId: string;
+  downloadUrl: string;
+  mimeType: string;
+  durationMs: number;
+  senderName: string;
+  senderInitials: string;
+}