replace encoding/json with json-iterator everywhere so we get rid of HTML encoding and maybe be faster.

helpers.go

@@ -12,12 +12,15 @@ import (
 
 	"github.com/fatih/color"
 	"github.com/fiatjaf/cli/v3"
+	jsoniter "github.com/json-iterator/go"
 	"github.com/nbd-wtf/go-nostr"
 	"github.com/nbd-wtf/go-nostr/sdk"
 )
 
 var sys = sdk.NewSystem()
 
+var json = jsoniter.ConfigFastest
+
 func init() {
 	sys.Pool = nostr.NewSimplePool(context.Background(),
 		nostr.WithUserAgent("nak/b"),