add Int64Component

internal/block/text_component/text_component.go

@@ -52,13 +52,20 @@ type TextComponentInstance struct {
 	value string
 }
 
+func (t *TextComponentInstance) Value() interface{} {
+	return t.value
+}
+
 func (t *TextComponentInstance) FromJSON(component block.Component, data json.RawMessage) error {
 	var s string
-	err := json.Unmarshal(data, &s)
-	if err != nil {
-		return err
+
+	if data != nil {
+		err := json.Unmarshal(data, &s)
+		if err != nil {
+			return err
+		}
+		t.value = s
 	}
-	t.value = s
 
 	for _, v := range component.Validators() {
 		if err := v(s); err != nil {
@@ -81,5 +88,4 @@ type TextValidator func(value any) error
 type TextComponentConfig struct {
 	Validators []TextValidator
 }
-
 type TextComponentOption func(*TextComponentConfig)