Added embed server for plugin library

- Added embeded resources server for plugin library
- Added ztnc plugin for global area network
- Added wide mode for side wrapper

example/plugins/ztnc/main.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"embed"
+
+	"aroz.org/zoraxy/ztnc/mod/database"
+	"aroz.org/zoraxy/ztnc/mod/ganserv"
+	plugin "aroz.org/zoraxy/ztnc/mod/zoraxy_plugin"
+)
+
+const (
+	PLUGIN_ID       = "org.aroz.zoraxy.ztnc"
+	UI_RELPATH      = "/ui"
+	EMBED_FS_ROOT   = "/web"
+	DB_FILE_PATH    = "ztnc.db"
+	AUTH_TOKEN_PATH = "./authtoken.secret"
+)
+
+//go:embed web/*
+var content embed.FS
+
+var (
+	sysdb      *database.Database
+	ganManager *ganserv.NetworkManager
+)
+
+func main() {
+	// Serve the plugin intro spect
+	runtimeCfg, err := plugin.ServeAndRecvSpec(&plugin.IntroSpect{
+		ID:            PLUGIN_ID,
+		Name:          "ztnc",
+		Author:        "aroz.org",
+		AuthorContact: "zoraxy.aroz.org",
+		Description:   "UI for ZeroTier Network Controller",
+		URL:           "https://zoraxy.aroz.org",
+		Type:          plugin.PluginType_Utilities,
+		VersionMajor:  1,
+		VersionMinor:  0,
+		VersionPatch:  0,
+
+		// As this is a utility plugin, we don't need to capture any traffic
+		// but only serve the UI, so we set the UI (relative to the plugin path) to "/ui/" to match the HTTP Handler
+		UIPath: UI_RELPATH,
+	})
+	if err != nil {
+		//Terminate or enter standalone mode here
+		panic(err)
+	}
+
+	// Register the shutdown handler
+	plugin.RegisterShutdownHandler(func() {
+		fmt.Println("Shutting down ZeroTier Network Controller")
+		if sysdb != nil {
+			sysdb.Close()
+		}
+		fmt.Println("ZeroTier Network Controller Exited")
+	})
+
+	// Create a new PluginEmbedUIRouter that will serve the UI from web folder
+	uiRouter := plugin.NewPluginEmbedUIRouter(PLUGIN_ID, &content, EMBED_FS_ROOT, UI_RELPATH)
+
+	// This will serve the index.html file embedded in the binary
+	http.Handle(UI_RELPATH+"/", uiRouter.Handler())
+
+	// Start the GAN Network Controller
+	err = startGanNetworkController()
+	if err != nil {
+		panic(err)
+	}
+
+	// Initiate the API endpoints
+	initApiEndpoints()
+
+	// Start the HTTP server, only listen to loopback interface
+	fmt.Println("Plugin UI server started at http://127.0.0.1:" + strconv.Itoa(runtimeCfg.Port) + UI_RELPATH)
+	http.ListenAndServe("127.0.0.1:"+strconv.Itoa(runtimeCfg.Port), nil)
+}