message: add notes on using ast-create-node script
diff: @@ -102,8 +102,26 @@ The `category` is one of the lint category folders defined in [`packages/@romefr
  For example, to create a rule in the `js` category called `camelCase` run:
  -```
  +```bash
  ./rome run scripts/lint-create-rule js/camelCase
  ```
  The created files will be listed in the console output. See those files for inline comments on what to insert. Use other lint rules as a reference.
  +
  +### `ast-create-node`
  +
  +This is used to generate new ast nodes and boilerplate.
  +
  +```bash
  +./rome run scripts/ast-create-node [language] [nodeType] [category]
  +```
  +
  +The `language` is one of the language folders defined in [`https://github.com/romefrontend/rome/tree/main/packages/@romefrontend/ast/`]
  +
  +The `category` is one of the category folders inside the `language` folders.
  +
  +```bash
  +./rome run scripts/ast-create-node js JSArrayType typescript
  +```
  +
  +The created files will be listed in the console output.
  