Create a system proxy change after receiving a network map

This is experimental and needs more test.

the purpose of this change is to validate that a TLS connection stuck using old routes because of keepalive settings on the remote webserver are reset once netbird receives a network map

client/internal/proxy/manager_other.go

@@ -0,0 +1,45 @@
+//go:build !darwin || ios
+
+package proxy
+
+import (
+	"github.com/netbirdio/netbird/client/internal/statemanager"
+)
+
+// Manager is a no-op proxy manager for non-macOS platforms.
+type Manager struct{}
+
+// NewManager creates a new proxy manager (no-op on non-macOS).
+func NewManager(_ *statemanager.Manager) *Manager {
+	return &Manager{}
+}
+
+// EnableWebProxy is a no-op on non-macOS platforms.
+func (m *Manager) EnableWebProxy(host string, port int) error {
+	return nil
+}
+
+// DisableWebProxy is a no-op on non-macOS platforms.
+func (m *Manager) DisableWebProxy() error {
+	return nil
+}
+
+// SetAutoproxyURL is a no-op on non-macOS platforms.
+func (m *Manager) SetAutoproxyURL(pacURL string) error {
+	return nil
+}
+
+// DisableAutoproxy is a no-op on non-macOS platforms.
+func (m *Manager) DisableAutoproxy() error {
+	return nil
+}
+
+// IsEnabled always returns false on non-macOS platforms.
+func (m *Manager) IsEnabled() bool {
+	return false
+}
+
+// Restore is a no-op on non-macOS platforms.
+func (m *Manager) Restore(services []string) error {
+	return nil
+}