Initial Navis client with NaiveProxy, profiles, ping and git updates

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/vpnapp/msgbox_windows.go

@@ -0,0 +1,16 @@
+//go:build windows
+
+package main
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func messageBox(text string) {
+	user32 := syscall.NewLazyDLL("user32.dll")
+	proc := user32.NewProc("MessageBoxW")
+	title, _ := syscall.UTF16PtrFromString("Navis")
+	body, _ := syscall.UTF16PtrFromString(text)
+	proc.Call(0, uintptr(unsafe.Pointer(body)), uintptr(unsafe.Pointer(title)), 0x10) // MB_ICONERROR
+}