[Feature Request/Reference] New NcCombobox component for real-time free-text input

🛡️ [Feature Reference] New NcCombobox component for real-time free-text input

Is your feature request related to a problem? Please describe.
Currently, NcSelectTags and NcSelect are excellent for selecting defined entities, but they often struggle with true "Combobox" scenarios. In many search-as-you-type or ad-hoc creation workflows, the user's live-typed text is the primary source of truth.

Existing components sometimes:

1. Clear the input on blur if no existing match is selected.
2. Delay the v-model synchronization until a final selection is made (Enter/Click).
3. Require significant boilerplate to behave like a standard text input with suggestions.

Describe the solution you'd like
I have developed a reference implementation for an NcCombobox. It wraps NcSelect (v9+) to provide a seamless "Input + Suggestions" experience that feels native to the Nextcloud Design System (NDS).

Key improvements in this implementation:

• Instant Sync: Emits update:modelValue on every keystroke using the @search-change event.
• Persistent Free-text: Configured with taggable and push-tags to ensure user input is never discarded or reset.
• Native NDS Look: Inherits all CSS variables, focus rings, and z-index behaviors from @nextcloud/vue.
• Lightweight: Uses the official NcSelect as a parent to stay future-proof.

Reference Implementation
I have set up a standalone repository with documentation, professional structure, and even a Klingon translation (for honor!):

👉 [[https://github.com/tx0h/NcCombobox]]

License
To make integration into the Nextcloud ecosystem as easy as possible, the project is dual-licensed under MIT and Artistic License 2.0.

Additional context
I believe this would be a valuable addition to the @nextcloud/vue library to support more dynamic search and tagging interfaces across the ecosystem. I am happy to discuss merging this logic into the core or maintaining it as a reference for other developers.

Qapla'!

Start by reviewing the existing NcSelect component in @nextcloud/vue and the linked NcCombobox reference implementation. Compare its @search-change synchronization with the taggable and push-tags behavior, then clarify whether the desired outcome is core integration or a maintained reference component.