add descriptions for readme config fields in generators.yml reference (#204)

Author: tstanmay13

fern/products/sdks/reference/generators-yml-reference.mdx

@@ -378,7 +378,7 @@ metadata:
 </ParamField>
 
 ## readme
-Controls what goes into the generated README files across all SDKs.
+Controls what goes into the generated README files across all SDKs, allowing you to customize the content and structure of your SDK documentation.
 
 ```yaml
 readme:
@@ -401,31 +401,39 @@ readme:
         path: "/users"
 ```
 
-<ParamField path="readme" type="ReadmeSchema" required={false} toc={true}>
+<ParamField path="bannerLink" type="string" required={false} toc={true}>
+  URL for a banner image or link that appears at the top of the README.
 </ParamField>
 
-<ParamField path="readme.bannerLink" type="string" required={false} toc={true}>
+<ParamField path="introduction" type="string" required={false} toc={true}>
+  Custom introduction text that appears at the beginning of the README.
 </ParamField>
 
-<ParamField path="readme.introduction" type="string" required={false} toc={true}>
+<ParamField path="apiReferenceLink" type="string" required={false} toc={true}>
+  URL to your external API documentation or reference guide.
 </ParamField>
 
-<ParamField path="readme.apiReferenceLink" type="string" required={false} toc={true}>
+<ParamField path="defaultEndpoint" type="ReadmeEndpointSchema" required={false} toc={true}>
+  Specifies which endpoint's code snippet to showcase as the primary example in the README.
 </ParamField>
 
-<ParamField path="readme.defaultEndpoint" type="ReadmeEndpointSchema" required={false} toc={true}>
+<ParamField path="features" type="map<string, list<ReadmeEndpointSchema>>" required={false} toc={true}>
+  Groups endpoints by feature name for organized README sections. Each feature becomes a section in the README with example code snippets for the listed endpoints.
 </ParamField>
 
-<ParamField path="readme.defaultEndpoint.method" type="string" required={true} toc={true}>
-</ParamField>
+### defaultEndpoint
+Specifies which endpoint's code snippet to showcase as the primary example in the README.
 
-<ParamField path="readme.defaultEndpoint.path" type="string" required={true} toc={true}>
+<ParamField path="method" type="string" required={true} toc={true}>
+  HTTP method of the default endpoint (e.g., `GET`, `POST`, `PUT`, `DELETE`).
 </ParamField>
 
-<ParamField path="readme.defaultEndpoint.stream" type="boolean" required={false} toc={true}>
+<ParamField path="path" type="string" required={true} toc={true}>
+  Endpoint path for the default example (e.g., `/users`, `/auth/login`).
 </ParamField>
 
-<ParamField path="readme.features" type="map<string, list<ReadmeEndpointSchema>>" required={false} toc={true}>
+<ParamField path="stream" type="boolean" required={false} default="false" toc={true}>
+  Whether the endpoint is a streaming endpoint. Defaults to `false`.
 </ParamField>
 
 ## default-group