added booking types + working on overtime

Backend/models/database.go

@@ -0,0 +1,15 @@
+package models
+
+import (
+	"arbeitszeitmessung/helper"
+)
+
+var definedTypes = helper.NewCache(3600, func(key string) (any, error) {
+	switch key {
+	case "s_abwesenheit_typen":
+		return GetAbsenceTypes()
+	case "s_anwesenheit_typen":
+		return GetBookingTypes()
+	}
+	return nil, nil
+})