Add datetime picker for entry field in TaskDialog

[Hell1213]

Description

Add DateTimePicker component to the entry field in TaskDialog to allow users to select both date and time instead of date-only selection.

• Contributes: Add additional time picker for time(and date) based fields in TaskDialog #326

Checklist

• Ran npx prettier --write . (for formatting)
• Ran gofmt -w . (for Go backend)
• Ran npm test (for JS/TS testing)
• Added unit tests, if applicable
• Verified all tests pass
• Updated documentation, if needed

[github-actions]

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[Hell1213]

added datetime picker to entry field so users can now select both date and time instead of just date