refactor: input components

[mlmoravek]

Based on the update-config PR oruga-ui#605

This is part of oruga-ui#606

In this pull request I refactored all on OInput based components from Options-API to Composition-API.
Also some improvements are made and bugs are fixed.

Fixes oruga-ui#513
Fixes oruga-ui#570
Fixes oruga-ui#530
Fixes oruga-ui#516
Fixes oruga-ui#515

Proposed Changes

• Updated vue version.
• Refactor OInput
• Refactor OField
• Refactor OSelect
• Refactor OUpload
• Refactor Autocomplete
  • Fixed Autocomplete infinite scroll doesn't trigger when scrolling to the end via arrow keys oruga-ui/oruga#513
• Refactor Inputitems
• Refactor Datepicker
  • Fixed Datetimepicker: mobile native does not use provided value oruga-ui/oruga#570
  • Fixed monthRowClass is documented but never used oruga-ui/oruga#530
  • Fixed Disable instead of hide the Datepicker navigation button oruga-ui/oruga#516
  • Fixed Datepicker placeholder doesn't show up on mobile when input type is 'datetime-local' oruga-ui/oruga#515
• Refactor TimePicker
• Refactor DatetimePicker
• Refactor Dropdown (because used inside Datepicker)