Support the Phosphor icon library used by core
>>> [!note] Migrated issue
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Reported by: [phenaproxima](https://www.drupal.org/user/205645)
Related to !10
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<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>We have agreed in some phone calls with @pameeela to adopt the Phosphor icon library (a subset of which is already used in core) in Mercury.</p>
issue