docs: add settings.disable-explorer-proxy documentation

Document the new settings.disable-explorer-proxy option in docs.yml
that allows the API explorer to bypass the proxy when sending requests.
Include a warning about CORS requirements when this feature is enabled.

Co-Authored-By: Catherine Deskur <[email protected]>

Author: devin-ai-integration[bot]

fern/products/docs/pages/customization/what-is-docs-yml.mdx

@@ -536,6 +536,7 @@ layout:
 settings:
   search-text: "Search the docs..."
   disable-search: false
+  disable-explorer-proxy: false
   dark-mode-code: true
   default-search-filters: true
   http-snippets: false
@@ -551,6 +552,14 @@ settings:
   If set to true, the searchbar will be disabled. Use this if you want to use a custom search solution.
 </ParamField>
 
+<ParamField path="settings.disable-explorer-proxy" type="boolean" required={false} default="false" toc={true}>
+  If set to true, the API explorer will bypass the proxy when sending requests directly to your API.
+  
+  <Warning>
+  When this feature is enabled, your API must have CORS (Cross-Origin Resource Sharing) enabled to allow requests from the documentation domain.
+  </Warning>
+</ParamField>
+
 <ParamField path="settings.dark-mode-code" type="boolean" required={false} default="false" toc={true}>
   If set to true, the code blocks will be displayed in dark mode, regardless of the selected theme.
 </ParamField>