feat: add custom value support to combobox

[jose-costa-frontify]

Definition of Done

• [ ] User interface and experience have been verified by a designer
• [x] I have added thorough Cypress tests (All properties and interactions have been tested).
• [ ] Cross-browser compatibility - The component look consistent in the latest version of Chrome, Safari, Firefox and Edge.
• [ ] I've added documentation in Storybook. all properties are reflected in table and controls.
• [x] User interface is compliant with WCAG 2.1 AA. Ensure these items are fulfilled:
  • [x] Keyboard operability: All functionality can be accessed using only the keyboard
  • [x] Logical tab order: Interactive elements follow a consistent and logical tab order
  • [x] Visual indication of focus: Focused elements are visually highlighted for keyboard navigation
  • [x] Color contrast: Sufficient contrast is used between text and background, as well as form fields and background
  • [x] Alternative visual cues: Information is not solely reliant on color and includes alternative visual indicators
  • [x] Semantic markup: Headings, lists, and form elements are marked up with appropriate semantic tags

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 8915882d72b6b4c68d4fb8ed7bda0d529b02a7fc

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

This PR includes changesets to release 2 packages

Name	Type
@frontify/fondue-components	Patch
@frontify/fondue	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions[bot]]

PR Preview Action v1.4.7 :---: :rocket: Deployed preview to https://Frontify.github.io/fondue/pr-preview/pr-2001/ on branch gh-pages at 2024-08-12 10:47 UTC

[SamuelAlev]

Stale, closing until we find the need for it