• Change default for --origin flag of buf beta studio-agent to https://studio.buf.build
• Change default for --timeout flag of buf beta studio-agent to 0 (no timeout). Before it was
  2m (the default for all the other buf commands).
• Add support for experimental code generation with the plugin: key in buf.gen.yaml.
• Preserve single quotes with buf format.
• Support junit format errors with --error-format.