(sdks) Document smart-casing option (#1168)

Author: devalog

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

@@ -390,6 +390,7 @@ groups:
     generators:
       - name: fernapi/fern-typescript-node-sdk
         version: 0.9.0
+        smart-casing: true
 ```
 
 <ParamField path="name" type="string" required={true}>
@@ -400,6 +401,13 @@ The Fern generator package name (e.g., fernapi/fern-typescript-node-sdk)
 Specific version of the generator to use
 </ParamField>
 
+<ParamField path="smart-casing" type="boolean" default="false">
+Enables intelligent case conversion that preserves numbers and common programming patterns:
+- Numbers stay intact (e.g., `v2` instead of `v_2`, `getUsersV2` instead of `getUsersV_2`)
+- Initialisms are preserved (e.g., `CustomerID` instead of `CustomerId`)
+- Acronyms remain correct (e.g., `HTTPSConnection` stays `HTTPSConnection`)
+</ParamField>
+
 #### `config`
 
 Language-specific configuration options.