feat(12.2-04): add the datepicker field and stored date and time list cells

- pin @internationalized/date 3.12.4 as a direct admin dependency (approved)
- dateFormat.ts parses and emits date, datetime (local display, UTC emit,
  ignoreTimezone wall clock) and time values without the global Date
- DatepickerField on Reka DatePicker and TimeField with locale segments,
  calendar popover, clear button, min/max and yearRange bounds
- list cells of type date and time render the stored string
- datepicker lang keys in en and pl; rebuilt boardwalk dist

modules/phrasebook/backend/lang/en/lang.yaml

@@ -104,6 +104,11 @@ extension:
   widget_failed: This control could not be loaded. Refresh the page; if it happens again, check the plugin's assets.
   partial_failed: This section could not be loaded. Refresh the page to try again.
   action_failed: The action could not be completed. Please try again.
+datepicker:
+  open_calendar: Open calendar
+  clear: Clear value
+  prev_month: Previous month
+  next_month: Next month
 fileupload:
   attachment: Attachment details
   help: Add a title and description for this attachment.