Migrate type checker to ty

Much faster than mypy. Matches usage of ruff from same developer.

docs/conf.py

@@ -17,7 +17,7 @@ from functools import lru_cache, partial
 from typing import Any, Callable, Dict, Iterable, Iterator, List, Tuple
 
 from docutils import nodes
-from docutils.parsers.rst.roles import set_classes
+from docutils.parsers.rst.roles import normalize_options
 from pygments.lexer import RegexLexer
 from pygments.lexer import bygroups as untyped_bygroups
 from pygments.token import Comment, Error, Keyword, Literal, Name, Number, String, Whitespace
@@ -221,7 +221,7 @@ def commit_role(
         prb = inliner.problematic(rawtext, rawtext, msg)
         return [prb], [msg]
     url = f'https://github.com/kovidgoyal/kitty/commit/{commit_id}'
-    set_classes(options)
+    normalize_options(options)
     short_id = subprocess.check_output(
         f'git rev-list --max-count=1 --abbrev-commit {commit_id}'.split()).decode('utf-8').strip()
     node = nodes.reference(rawtext, f'commit: {short_id}', refuri=url, **options)
@@ -498,7 +498,7 @@ def link_role(
         return [prb], [msg]
     text, url = m.group(1, 2)
     url = url.replace(' ', '')
-    set_classes(options)
+    normalize_options(options)
     node = nodes.reference(rawtext, text, refuri=url, **options)
     return [node], []
 
@@ -672,7 +672,7 @@ def monkeypatch_man_writer() -> None:
         th += "\n"
         sh_tmpl: str = (".SH Name\n"
                    "%(ktitle)s \\- %(subtitle)s\n")
-        return th + sh_tmpl % di  # type: ignore
+        return th + sh_tmpl % di
 
     setattr(ManualPageTranslator, 'header', header)