`gdnative-doc` allows for an optional `toml` configuration file. The current valid entries are :

- `url_overrides: HashMap<String, String>`:
  List of items for which the linking url should be overriden.
- `rename_classes: HashMap<String, String>`:
  Renaming of types when going from Rust to Godot.

  This is useful because GDNative allows defining a `script_class_name` in the
  `.gdns` file.
- `markdown_options: Vec<String>`:
  Optional markdown options.

  ### Valid options
  - FOOTNOTES
  - SMART_PUNCTUATION
  - STRIKETHROUGH
  - TABLES
  - TASKLISTS
  
  ### Default
  No option enabled.
