feat: implement transparency for Windows (#46)

src/shared/IpcEvents.ts

@@ -11,6 +11,7 @@ export const enum IpcEvents {
     GET_RENDERER_CSS_FILE = "VCD_GET_RENDERER_CSS_FILE",
 
     GET_VERSION = "VCD_GET_VERSION",
+    SUPPORTS_WINDOWS_TRANSPARENCY = "VCD_SUPPORTS_WINDOWS_TRANSPARENCY",
 
     RELAUNCH = "VCD_RELAUNCH",
     CLOSE = "VCD_CLOSE",

src/shared/settings.d.ts

@@ -7,6 +7,7 @@
 import type { Rectangle } from "electron";
 
 export interface Settings {
+    transparencyOption?: "none" | "mica" | "tabbed" | "acrylic";
     maximized?: boolean;
     minimized?: boolean;
     windowBounds?: Rectangle;