docs: add exampleStyle configuration for README generation

Add documentation for the new exampleStyle field in README configuration.
This field allows users to control the verbosity of usage examples in
generated SDK README files, choosing between minimal (required parameters
only) and comprehensive (all parameters) styles.

Refs fern-api/fern#10001, fern-api/fern#9854

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

Author: devin-ai-integration[bot]

fern/products/sdks/snippets/readme-options.mdx

@@ -4,6 +4,7 @@ readme:
   introduction: "Welcome to our API"
   apiReferenceLink: "https://docs.example.com"
   apiName: "Example Product"
+  exampleStyle: "minimal"
   disabledSections:
     - "contributing"
   defaultEndpoint:
@@ -51,6 +52,10 @@ readme:
   Name of the API that appears in the README. Will appear as `Your Api Name SDK` or `Your Api Name API` throughout the README. Defaults to organization name if not set.
 </ParamField>
 
+<ParamField path="exampleStyle" type="'minimal' | 'comprehensive'" required={false} default="comprehensive" toc={true}>
+  Controls the verbosity of usage examples in the generated README. Use `minimal` to show only required parameters with simplified examples, or `comprehensive` to show all parameters including optional ones. Minimal examples improve readability for APIs with many optional fields.
+</ParamField>
+
 <ParamField path="disabledSections" type="list of strings" required={false} toc={true}>
   Sections to disable in the README. Supported values: `"contributing"`.
 </ParamField>