chore: move the go code into a subfolder

apps/api/internal/notification/messages/form.go

@@ -0,0 +1,27 @@
+package messages
+
+import (
+	"net/url"
+
+	"github.com/zitadel/schema"
+
+	"github.com/zitadel/zitadel/internal/eventstore"
+	"github.com/zitadel/zitadel/internal/notification/channels"
+)
+
+var _ channels.Message = (*Form)(nil)
+
+type Form struct {
+	Serializable        any
+	TriggeringEventType eventstore.EventType
+}
+
+func (msg *Form) GetContent() (string, error) {
+	values := make(url.Values)
+	err := schema.NewEncoder().Encode(msg.Serializable, values)
+	return values.Encode(), err
+}
+
+func (msg *Form) GetTriggeringEventType() eventstore.EventType {
+	return msg.TriggeringEventType
+}