add linux audio screensharing (#130)

Co-authored-by: V <vendicated@riseup.net>
Co-authored-by: kaitlynkitty <87152313+kaitlynkittyy@users.noreply.github.com>
Co-authored-by: Curve <fynnbwdt@gmail.com>

src/renderer/utils.ts

@@ -17,3 +17,4 @@ const { platform } = navigator;
 
 export const isWindows = platform.startsWith("Win");
 export const isMac = platform.startsWith("Mac");
+export const isLinux = platform.startsWith("Linux");