List all users in the system (fixes #373)

Signed-off-by: AnErrupTion <anerruption@disroot.org>

src/UidRange.zig

@@ -0,0 +1,6 @@
+const std = @import("std");
+
+// We set both values to 0 by default so that, in case they aren't present in
+// the login.defs for some reason, then only the root username will be shown
+uid_min: std.c.uid_t = 0,
+uid_max: std.c.uid_t = 0,