Add Unix Domain Socket Listener when Establishing Connections (#243)

This makes it possible to send wsh commands from wsh on a remote session
to wavesrv running locally. The exact behavior of running those commands
isn't implemented, but the underlying interface is added here.

frontend/types/gotypes.d.ts

@@ -398,7 +398,7 @@ declare global {
         enabled: boolean;
     };
 
-    // shellexec.TermSize
+    // wstore.TermSize
     type TermSize = {
         rows: number;
         cols: number;