Allow omitted props in Workbench page specs and component mocks
>>> [!note] Migrated issue
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<!-- Migrated from issue #3586726. -->
Reported by: [balintbrews](https://www.drupal.org/user/613760)
Related to !979
>>>
<h3 id="overview">Overview</h3>
<p>Workbench and the Canvas CLI currently expect authored page spec elements and component mock elements to include a <code>props</code> key, even when no props need to be passed, requirring <code>{}</code> as the value.</p>
<p>This is not very convenient, and it's also something that coding agents can easily miss.</p>
<h3 id="proposed-resolution">Proposed resolution</h3>
<p>Normalize omitted <code>props</code> to <code>{}</code> for authored page spec elements and component mock elements before validation or rendering.</p>
<h3 id="ui-changes">User interface changes</h3>
<p>n/a</p>
issue