app: generate and replace passwd and group files

This ensures libc functions get correct user information.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

internal/shim/payload.go

@@ -13,7 +13,7 @@ type Payload struct {
 	Exec [2]string
 	// bwrap config, nil for permissive
 	Bwrap *bwrap.Config
-	// whether to pas wayland fd
+	// whether to pass wayland fd
 	WL bool
 
 	// verbosity pass through