Implement copy action for input

[JoCa96]

Copied from #573:

Depends on

• Implement OnyxInput #189

Question

• The success state of OnyxTextarea is not in figma anymore? should it be removed from this ticket?

Why?

The input should support copying the current value to the clipboard as well as a clear action and a valid state.
The select should support a valid state.

Design

• Input Valid/success state
• Input Copy + clear feature
• Select Valid/Success state

Success state

• is not the same as the "valid" state
• is an optional feature
• error state has higher priority
• therefore must not have impact on validation
• for now only support for inputs (text, select) and not for textarea

https://www.figma.com/design/EBi98T51T9fGfjrYYfsulg/onyx---Archive?node-id=3427-73120&t=WFV3kII28sKTTZft-4

Copy action

• Independent of success state, doesn't trigger success state for input
• shows an icon after copy, maybe a special "success copy" icon?
• support for custom copy action?
• combinable with success

https://www.figma.com/design/EBi98T51T9fGfjrYYfsulg/onyx---Archive?node-id=3427-72824&t=WFV3kII28sKTTZft-4

Acceptance criteria

For OnyxInput

• a copy icon can be displayed that copies the current value to the clipboard
• a clear icon can be displayed that clears the current value
• the input supports a valid state
  • the info message tooltip is aligned with the state color
  • valid state is controlled by the projects (via a slot)

For OnyxSelect

• the input supports a valid state
  • the info message tooltip is aligned with the state color
  • valid state is controlled by the projects (via a slot)

Definition of Done

• covered by component tests
• screenshot tests are updated
• follow-up tickets were created if necessary
• updated version + documentation is deployed
• Storybook can show the feature
• Set task to In Approval

Review

• add link to deployed storybook
• approved by designer @jannick-ux
• approved by dev add dev tag

Implementation details

• use the :valid pseudo CSS selector
• event is emitted when copy icon is clicked