Create XFilterBar component

[schogges]

Description

As a first step we have to refactor our current FilterBar component. Ideally we define a new XFilterBar component.

Requirements:

• Leverages KInput
  • Specifically before slot for the icon
• Each tag:value is highlighted as depicted in designs (see umbrella issue)
• The full input value is still one string, which means that as a user I can click in a tag:value and modify/delete what I need to change without loosing the highlighted tag:value pair
• On submit the full input value is parsed and returned via callback/event-handler. We can still include the raw input value. If possible we have type support and auto-completion based on the provided fields (props).
• The implementation of the dropdown is not in the scope of this issue and will be implemented subsequently