Add claude code as a provider that doesn't need configuration (RooCodeInc#5038)

Author: mrubens

src/shared/checkExistApiConfig.ts

@@ -23,4 +23,4 @@ export function checkExistKey(config: ProviderSettings | undefined) {
 	].some((value) => value !== undefined)
 
 	return hasSecretKey || hasOtherConfig
-}
+}