fix(api-template): repair Go brace and collapse summary whitespace (#735)

* fix(api-template): repair Go brace and collapse summary whitespace

The ApiTemplate accidentally emitted `{` instead of `}` for the closing
brace after the early-return error check in the Go example, leaving every
generated Go snippet syntactically invalid. The summary description was
also rendered raw, so multi-line OpenAPI descriptions broke the MDX
parser when the closing tag landed inside a JSX paragraph.

Fix the template at the source and regenerate the affected resource
pages so the API docs build cleanly again.

* chore: ignore generator tsbuildinfo

.gitignore

@@ -27,6 +27,7 @@ package-lock.json
 /generator/openapi/
 /generator/openapi.yml
 /generator/expandOpenAPIRef
+/generator/tsconfig.tsbuildinfo
 
 # LLM documentation (generated)
 /public/llms/