refactor: use new typescript types to to able to remove eslint-disable comment

src/main/entities/decorators/percent-check.ts

@@ -6,8 +6,7 @@ export const maxValue = Number.MAX_SAFE_INTEGER;
 /**
  * @param column the column which needs to be checked
  */
-// eslint-disable-next-line @typescript-eslint/ban-types -- the type would be "(classOrObject: object, propertyName: string) => object" but typeorm does not provide it
-export function PercentCheck(column: string): Function {
+export function PercentCheck(column: string): ClassDecorator & PropertyDecorator {
   return Check(
     `${column} needs to be between ${minValue} and ${maxValue}`,
     `${column} >= ${minValue} AND ${column} <= ${maxValue}`