implemented http server

internal/string_helper/StringBuilder.go

@@ -4,6 +4,7 @@ import (
 	"io"
 	"slices"
 	"strconv"
+	"time"
 	"unicode/utf8"
 )
 
@@ -65,6 +66,11 @@ func (b *StringBuilder) AddBool(v bool) *StringBuilder {
 	return b
 }
 
+func (b *StringBuilder) AddT(v time.Time, fmt string) *StringBuilder {
+	b.Buf = v.AppendFormat(b.Buf, fmt)
+	return b
+}
+
 // numberBase: 2 <= base <= 36
 func (b *StringBuilder) AddIExt(v int64, numberBase int) *StringBuilder {
 	b.Buf = strconv.AppendInt(b.Buf, v, numberBase)