[IMP] web: Expose datepicker configuration to view declarations

The lower-level widget itself supports passing options to the underlying
datepicker library. However this is not exposed to higher-level view
declaration. With this patch, one can declare a field in a view such as:

```xml
<field name="datefield" options='{"daysOfWeekDisabled": [0, 6]}'/>
```

That option would land in the widget and disable those weekdays.

Documentation has been updated accordingly.

Closes #25044.

1 files changed, 7 insertions, 1 deletions

diff --git a/addons/web/static/src/js/fields/basic_fields.js b/addons/web/static/src/js/fields/basic_fields.js
index ac8ad02b24a..ba4169d2617 100644
--- a/addons/web/static/src/js/fields/basic_fields.js
+++ b/addons/web/static/src/js/fields/basic_fields.js
@@ -468,7 +468,13 @@ var FieldDate = InputField.extend({
      * @private
      */
     _makeDatePicker: function () {
-        return new datepicker.DateWidget(this, {defaultDate: this.value});
+        return new datepicker.DateWidget(
+            this,
+            _.defaults(
+                this.nodeOptions.datepicker || {},
+                {defaultDate: this.value}
+            )
+        );
     },
 
     /**