[management, reverse proxy] Add reverse proxy feature (#5291)

* implement reverse proxy


---------

Co-authored-by: Alisdair MacLeod <git@alisdairmacleod.co.uk>
Co-authored-by: mlsmaycon <mlsmaycon@gmail.com>
Co-authored-by: Eduard Gert <kontakt@eduardgert.de>
Co-authored-by: Viktor Liu <viktor@netbird.io>
Co-authored-by: Diego Noguês <diego.sure@gmail.com>
Co-authored-by: Diego Noguês <49420+diegocn@users.noreply.github.com>
Co-authored-by: Bethuel Mmbaga <bethuelmbaga12@gmail.com>
Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>
Co-authored-by: Ashley Mensah <ashleyamo982@gmail.com>

management/internals/modules/peers/manager.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/rs/xid"
 	log "github.com/sirupsen/logrus"
 
 	"github.com/netbirdio/netbird/management/internals/controllers/network_map"
@@ -32,6 +33,7 @@ type Manager interface {
 	SetIntegratedPeerValidator(integratedPeerValidator integrated_validator.IntegratedValidator)
 	SetAccountManager(accountManager account.Manager)
 	GetPeerID(ctx context.Context, peerKey string) (string, error)
+	CreateProxyPeer(ctx context.Context, accountID string, peerKey string, cluster string) error
 }
 
 type managerImpl struct {
@@ -182,3 +184,36 @@ func (m *managerImpl) DeletePeers(ctx context.Context, accountID string, peerIDs
 func (m *managerImpl) GetPeerID(ctx context.Context, peerKey string) (string, error) {
 	return m.store.GetPeerIDByKey(ctx, store.LockingStrengthNone, peerKey)
 }
+
+func (m *managerImpl) CreateProxyPeer(ctx context.Context, accountID string, peerKey string, cluster string) error {
+	existingPeerID, err := m.store.GetPeerIDByKey(ctx, store.LockingStrengthNone, peerKey)
+	if err == nil && existingPeerID != "" {
+		// Peer already exists
+		return nil
+	}
+
+	name := fmt.Sprintf("proxy-%s", xid.New().String())
+	peer := &peer.Peer{
+		Ephemeral: true,
+		ProxyMeta: peer.ProxyMeta{
+			Cluster:  cluster,
+			Embedded: true,
+		},
+		Name:                        name,
+		Key:                         peerKey,
+		LoginExpirationEnabled:      false,
+		InactivityExpirationEnabled: false,
+		Meta: peer.PeerSystemMeta{
+			Hostname: name,
+			GoOS:     "proxy",
+			OS:       "proxy",
+		},
+	}
+
+	_, _, _, err = m.accountManager.AddPeer(ctx, accountID, "", "", peer, false)
+	if err != nil {
+		return fmt.Errorf("failed to create proxy peer: %w", err)
+	}
+
+	return nil
+}