code: def setup(app):
      app.add_directive("mdinclude", MdInclude)
      app.add_config_value("no_underscore_emphasis", False, "env")
      app.add_config_value("m2r_parse_relative_links", False, "env")
      app.add_config_value("m2r_anonymous_references", False, "env")
      app.add_config_value("m2r_disable_inline_math", False, "env")
      app.add_config_value(
          "m2r_use_mermaid",
          "sphinxcontrib.mermaid" in app.config.extensions,
          "env",
      )
  
      return {
          "version": "0.0.1",
          "parallel_read_safe": True,
          "parallel_write_safe": True,
      }
  
label_desc: Use image node_id 1 for calling a global function with example usage: setup(app) and returns: dict