feat(): datepicker improve user input with adding separators

[mladenplaninicic]

Closes #1216

• Design Review by @Gagne87, @clastzoo
• Technical Review by @hirsch88, @mladenplaninicic
• Style Guide Review @hirsch88, @mladenplaninicic
• Visual test done by @hirsch88, @mladenplaninicic, @Gagne87, @clastzoo
• Functional test done by @hirsch88, @mladenplaninicic
• Browser Testing by @hirsch88, @mladenplaninicic, @Gagne87, @clastzoo
  • Desktop
    • Chrome
    • Edge
    • Safari
    • Firefox
  • Tablet
    • iPad (Landscape / Portrait)
  • Mobile
    • Safari iOS
    • Chrome Preview

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Name	Status	Preview	Comments	Updated
design-system	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 31, 2023 at 11:45AM (UTC)

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 2239f5c5c408ce9a129278b582e04a03c6087a68

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 15 packages

| Name | Type | | -------------------------------------------- | ----- | | @baloise/design-system-components | Minor | | @baloise/design-system-components-angular | Minor | | @baloise/design-system-components-react | Minor | | @baloise/design-system-components-table | Minor | | @baloise/design-system-components-vue | Minor | | @baloise/design-system-testing | Minor | | @baloise/design-system-css | Minor | | @baloise/design-system-favicons | Minor | | @baloise/design-system-fonts | Minor | | @baloise/design-system-icons | Minor | | @baloise/design-system-maps | Minor | | @baloise/design-system-tokens | Minor | | @baloise/design-system-output-target-angular | Minor | | @baloise/design-system-output-target-react | Minor | | @baloise/design-system-output-target-vue | Minor |

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[hirsch88]

• [x] user should be able to press the separators and if not we add them for them