feat(#4718): add shared search select component

[tenthe]

Purpose

Overview

This PR adds a shared sp-search-select component for searchable single- and multi-select inputs and migrates existing custom autocomplete/chip selectors to use it. The component keeps selected values as full objects, filters client-side, and provides consistent behavior for datasets, labels, permissions, and service tags.

Changes

• Adds a reusable shared UI search-select component with signal-based inputs, single/multi-select support, keyboard-friendly Material autocomplete behavior, clear handling, and optional option/chip templates.
• Supports colored item objects by rendering them consistently as small sp-label badges in both the input field and dropdown.
• Migrates the following views/components to sp-search-select:
  • Chart data settings dataset selector
  • Asset details labels selector
  • Object permission dialog authorized users selector
  • Object permission dialog authorized groups selector
  • Object manage dialog authorized users selector
  • Object manage dialog authorized groups selector
  • Adapter deployment settings service tags selector
• Documents the component usage, value behavior, client-side filtering, colored-label convention, and template extension points in the UI styleguide.

Remarks

PR introduces (a) breaking change(s): no

PR introduces (a) deprecation(s): no