Allow change to View Mode in RAG Action
>>> [!note] Migrated issue
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<!-- Migrated from issue #3478805. -->
Reported by: [scott_euser](https://www.drupal.org/user/3267594)
Related to !138
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Full view mode is used, but a different one with a subset of fields only might be desired instead.</p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>RAG Action within AI Assistant using rendered via LLM</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Add selection of view mode</p>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<p>MR</p>
<h3 id="summary-ui-changes">User interface changes</h3>
<p>View mode is selectable</p>
<h3 id="summary-api-changes">API changes</h3>
<p>N/A</p>
<h3 id="summary-data-model-changes">Data model changes</h3>
<p>N/A</p>
issue