fix: hide mermaid diagram controls in doc API overview docs (#2237)

Author: mattConnHarbour

apps/docs/document-engine/overview.mdx

@@ -22,7 +22,7 @@ All four share the same operation set. `find` is `editor.doc.find()` in the brow
 
 ## How it works
 
-```mermaid
+```mermaid actions={false}
 flowchart TD
     API["Document API<br/><em>source of truth</em>"]
     API --> CLI["CLI<br/>terminal interface"]