fix(provider): enable thinking for google-vertex-anthropic models (#10442)

Co-authored-by: Aiden Cline <aidenpcline@gmail.com>

packages/opencode/src/provider/transform.ts

@@ -26,6 +26,7 @@ export namespace ProviderTransform {
       case "@ai-sdk/amazon-bedrock":
         return "bedrock"
       case "@ai-sdk/anthropic":
+      case "@ai-sdk/google-vertex/anthropic":
         return "anthropic"
       case "@ai-sdk/google-vertex":
       case "@ai-sdk/google":