[no ci] [Doc] Add Working with Dates section to DatagridAG docs

Author: slax57

docs/DatagridAG.md

@@ -1326,6 +1326,13 @@ export const PostList = () => {
 ```
 {% endraw %}
 
+### Working with Dates
+
+When using `DatagridAG` with dates, [the `ag-grid` documentation](https://www.ag-grid.com/react-data-grid/cell-data-types/#date) states that:
+
+> The default Value Parser and Value Formatter use the ISO string format 'yyyy-mm-dd'.
+> If you wish to use a different date format, then you can [Override the Pre-Defined Cell Data Type Definition](https://www.ag-grid.com/react-data-grid/cell-data-types/#overriding-the-pre-defined-cell-data-type-definitions).
+
 ### Enabling Full Row Edition
 
 By default, editing is enabled on cells, which means you can edit a cell by double-clicking on it, and it will trigger a call to the dataProvider's `update` function.
@@ -2739,6 +2746,13 @@ export const PostList = () => {
 ```
 {% endraw %}
 
+### Working with Dates
+
+When using `DatagridAG` with dates, [the `ag-grid` documentation](https://www.ag-grid.com/react-data-grid/cell-data-types/#date) states that:
+
+> The default Value Parser and Value Formatter use the ISO string format 'yyyy-mm-dd'.
+> If you wish to use a different date format, then you can [Override the Pre-Defined Cell Data Type Definition](https://www.ag-grid.com/react-data-grid/cell-data-types/#overriding-the-pre-defined-cell-data-type-definitions).
+
 ### Enabling Infinite Pagination
 
 By default, `<DatagridAGClient>` renders pagination controls at the bottom of the list. You can disable these controls to switch to an infinite pagination mode, where the grid shows the next rows on scroll. Thanks to [ag-grid's DOM virtualization](https://www.ag-grid.com/react-data-grid/dom-virtualisation/), this mode causes no performance problem.