Release Notes:
- Differentiate between function and method calls and definitions.
`function.definition` matches the highlight for e.g. rust,
`function.call` is new.
- Likewise differentiate between class calls and class definitions.
- Better highlighting of function decorators (the `@` symbol is
punctuation, and now the decorator itself has a `function.decorator`
tag)
- Make `cls` a special variable (like `self`)
- Add `ellipsis` as a built-in constant
Note that most themes do not currently make use of the
`function.definition` tags, and none make use of the
`type.class.definition` tag. Hopefully more themes will pick this up.
*Before:*
<img width="248" alt="image"
src="https://github.com/user-attachments/assets/550ccd3d-594c-413a-b543-ef9caf39eee1">
*After:*
<img width="245" alt="image"
src="https://github.com/user-attachments/assets/47aa43b1-006b-4f9f-9029-510880f390ea">
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