fix(angular): add formatOptions property to standalone datetime (#29468)

Issue number: resolves #29464

---------

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## What is the current behavior?
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The standalone component for `ion-datetime` is missing the
`formatOptions` property. This component wrapper is manually maintained
and was missed when developing the feature.

## What is the new behavior?
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this PR. -->

- Adds the missing `formatOptions` property to the `ion-datetime` for
the angular standalone component

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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Author: sean-perkins

packages/angular/standalone/src/directives/datetime.ts

@@ -24,6 +24,7 @@ const DATETIME_INPUTS = [
   'disabled',
   'doneText',
   'firstDayOfWeek',
+  'formatOptions',
   'highlightedDates',
   'hourCycle',
   'hourValues',