update docs and TypeScript definitions for ObjectFieldTemplate (rjsf-team#1979)

Co-authored-by: yuval_cpx <yuval@cupixel.com>

Author: ValYouW

docs/advanced-customization/custom-templates.md

@@ -201,6 +201,7 @@ The following props are passed to each `ObjectFieldTemplate`:
 - `description`: A string value containing the description for the object.
 - `disabled`: A boolean value stating if the object is disabled.
 - `properties`: An array of object representing the properties in the array. Each of the properties represent a child with properties described below.
+- `onAddClick: (schema: JSONSchema7) => () => void`: Returns a function that adds a new property to the object (to be used with additionalProperties)
 - `readonly`: A boolean value stating if the object is read-only.
 - `required`: A boolean value stating if the object is required.
 - `schema`: The schema object for this object.

packages/core/index.d.ts

@@ -204,12 +204,15 @@ declare module '@rjsf/core' {
  TitleField: React.StatelessComponent<{ id: string; title: string; required: boolean }>;
  title: string;
  description: string;
+ disabled: boolean;
  properties: {
  content: React.ReactElement;
  name: string;
  disabled: boolean;
  readonly: boolean;
  }[];
+ onAddClick: (schema: JSONSchema7) => () => void;
+ readonly: boolean;
  required: boolean;
  schema: JSONSchema7;
  uiSchema: UiSchema;