Improve the editing experience for Prompts and LLM model selection
>>> [!note] Migrated issue
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Reported by: [yautja_cetanu](https://www.drupal.org/user/626050)
Related to !3
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Currently if you edit an agent the configuration appears in the drawer and gives you a tiny text box to edit the prompt. But these prompts can be long, have markdown and ideally should use the core Prompt Field so a prompt library can be used.</p>
<p>Have a button to open the Prompt editor in a larger or fullscreen prompt editing experience.</p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<h3 id="summary-ui-changes">User interface changes</h3>
<h3 id="summary-api-changes">API changes</h3>
<h3 id="summary-data-model-changes">Data model changes</h3>
issue