feat(p2p): Federation and AI swarms (#2723)

* Wip p2p enhancements

* get online state

* Pass-by token to show in the dashboard

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

* Style

* Minor fixups

* parametrize SearchID

* Refactoring

* Allow to expose/bind more services

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

* Add federation

* Display federated mode in the WebUI

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

* Small fixups

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

* make federated nodes visible from the WebUI

* Fix version display

* improve web page

* live page update

* visual enhancements

* enhancements

* visual enhancements

---------

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

core/p2p/node.go

@@ -0,0 +1,50 @@
+package p2p
+
+import (
+	"sync"
+	"time"
+)
+
+const defaultServicesID = "services_localai"
+const FederatedID = "federated"
+
+type NodeData struct {
+	Name          string
+	ID            string
+	TunnelAddress string
+	LastSeen      time.Time
+}
+
+func (d NodeData) IsOnline() bool {
+	now := time.Now()
+	// if the node was seen in the last 40 seconds, it's online
+	return now.Sub(d.LastSeen) < 40*time.Second
+}
+
+var mu sync.Mutex
+var nodes = map[string]map[string]NodeData{}
+
+func GetAvailableNodes(serviceID string) []NodeData {
+	if serviceID == "" {
+		serviceID = defaultServicesID
+	}
+	mu.Lock()
+	defer mu.Unlock()
+	var availableNodes = []NodeData{}
+	for _, v := range nodes[serviceID] {
+		availableNodes = append(availableNodes, v)
+	}
+	return availableNodes
+}
+
+func AddNode(serviceID string, node NodeData) {
+	if serviceID == "" {
+		serviceID = defaultServicesID
+	}
+	mu.Lock()
+	defer mu.Unlock()
+	if nodes[serviceID] == nil {
+		nodes[serviceID] = map[string]NodeData{}
+	}
+	nodes[serviceID][node.ID] = node
+}