feat: add ES annotations

src/core/base/ThingThatCanBeOffered.ts

@@ -25,6 +25,9 @@ import {SCISO8601Date} from '../types/Time';
 export interface SCPriceGroup {
   /**
    * Default price of the thing
+   * 
+   * @sortable price
+   * @float
    */
   default: number;
 }
@@ -36,16 +39,25 @@ export interface SCAcademicPriceGroup
   extends SCPriceGroup {
   /**
    * Price for employees
+   * 
+   * @sortable price
+   * @float
    */
   employee?: number;
 
   /**
    * Price for guests
+   * 
+   * @sortable price
+   * @float
    */
   guest?: number;
 
   /**
    * Price for students
+   * 
+   * @sortable price
+   * @float
    */
   student?: number;
 }
@@ -115,6 +127,8 @@ export interface SCThingThatCanBeOfferedTranslatableProperties
   extends SCThingTranslatableProperties {
   /**
    * Availability of an offer
+   * 
+   * @keyword
    */
   'offers[].availability'?: string;
 }