fix: add jsdoc comments to models

src/models/QueryFilter.ts

@@ -1,10 +1,32 @@
 import { FilterOperators } from '../enums/FilterOperators.js';
 
+/**
+ * @class QueryFilter - Represents a query filter.
+ */
 export class QueryFilter {
+  /**
+   * @property {number} fieldId - The id of the field to filter on.
+   */
   public fieldId: number;
+
+  /**
+   * @property {FilterOperators} operator - The operator for the filter.
+   */
   public operator: FilterOperators;
+
+  /**
+   * @property {string | number | Date | null} value - The value for the filter.
+   */
   public value: string | number | Date | null;
 
+  /**
+   * @constructor - Creates a new instance of the QueryFilter class.
+   * @param {number} fieldId - The id of the field to filter on.
+   * @param {FilterOperators} operator - The operator for the filter.
+   * @param {string | number | Date | null} value - The value for the filter.
+   * @returns {QueryFilter} - A new instance of the QueryFilter class.
+   * @throws {Error} - If the value is null and the operator is not IsNull or NotNull.
+   */
   constructor(
     fieldId: number,
     operator: FilterOperators,
@@ -23,6 +45,10 @@ export class QueryFilter {
     this.value = value;
   }
 
+  /**
+   * @method toString - Converts the filter to a string.
+   * @returns {string} - The filter as a string.
+   */
   public toString(): string {
     if (this.value == null) {
       return `${this.fieldId} ${this.operator}`;