chore(tun): not linux or not darwin tagged files

internal/tun/create_unspecified.go

@@ -0,0 +1,8 @@
+//go:build !linux && !darwin
+
+package tun
+
+// Create creates a TUN device at the path specified.
+func (t *Tun) Create(path string) error {
+	panic("not implemented")
+}