[docutils] Add missing stubs for writers dir

[donBarbos]

No description provided.

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

sphinx (https://github.com/sphinx-doc/sphinx)
+ sphinx/writers/html5.py:44: error: Unused "type: ignore" comment  [unused-ignore]
+ sphinx/writers/html5.py: note: In member "visit_reference" of class "HTML5Translator":
+ sphinx/writers/html5.py:350:57: error: Argument 4 to "starttag" of "HTMLTranslator" has incompatible type "**dict[str, str]"; expected "bool"  [arg-type]
+ sphinx/writers/html5.py: note: In member "visit_comment" of class "HTML5Translator":
+ sphinx/writers/html5.py:364:5: error: Signature of "visit_comment" incompatible with supertype "HTMLTranslator"  [override]
+ sphinx/writers/html5.py:364:5: note:      Superclass:
+ sphinx/writers/html5.py:364:5: note:          def visit_comment(self, node: comment, sub: Callable[[str, str], str] = ...) -> None
+ sphinx/writers/html5.py:364:5: note:      Subclass:
+ sphinx/writers/html5.py:364:5: note:          def visit_comment(self, node: Element) -> None
+ sphinx/writers/html5.py: note: In member "visit_admonition" of class "HTML5Translator":
+ sphinx/writers/html5.py:376:73: error: Argument 4 to "starttag" of "HTMLTranslator" has incompatible type "**dict[str, str]"; expected "bool"  [arg-type]
+ sphinx/writers/html5.py: note: In member "visit_download_reference" of class "HTML5Translator":
+ sphinx/writers/html5.py:727:61: error: Argument 4 to "starttag" of "HTMLTranslator" has incompatible type "**dict[str, str]"; expected "bool"  [arg-type]
+ sphinx/writers/html5.py:734:61: error: Argument 4 to "starttag" of "HTMLTranslator" has incompatible type "**dict[str, str]"; expected "bool"  [arg-type]
+ sphinx/writers/html5.py: note: In member "visit_abbreviation" of class "HTML5Translator":
+ sphinx/writers/html5.py:911:60: error: Argument 4 to "starttag" of "HTMLTranslator" has incompatible type "**dict[str, str]"; expected "bool"  [arg-type]
+ sphinx/writers/html5.py: note: In member "visit_table" of class "HTML5Translator":
+ sphinx/writers/html5.py:936:71: error: Argument 4 to "starttag" of "HTMLTranslator" has incompatible type "**dict[str, str]"; expected "bool"  [arg-type]
+ sphinx/writers/html.py:23: error: Unused "type: ignore" comment  [unused-ignore]
+ sphinx/writers/html.py: note: In member "translate" of class "HTMLWriter":
+ sphinx/writers/html.py:36:9: error: Item "None" of "document | None" has no attribute "walkabout"  [union-attr]
+ sphinx/writers/xml.py:15: error: Unused "type: ignore" comment  [unused-ignore]
+ sphinx/writers/xml.py: note: In member "translate" of class "XMLWriter":
+ sphinx/writers/xml.py:24:9: error: Item "None" of "document | None" has no attribute "settings"  [union-attr]
+ sphinx/writers/xml.py:27:9: error: Item "None" of "document | None" has no attribute "settings"  [union-attr]
+ sphinx/writers/xml.py:28:9: error: Item "None" of "document | None" has no attribute "settings"  [union-attr]
+ sphinx/writers/xml.py:32:9: error: Incompatible types in assignment (expression has type "NodeVisitor", variable has type "XMLTranslator")  [assignment]
+ sphinx/writers/xml.py:33:9: error: Item "None" of "document | None" has no attribute "walkabout"  [union-attr]
+ sphinx/writers/xml.py: note: At top level:
+ sphinx/writers/xml.py:37: error: Unused "type: ignore" comment  [unused-ignore]
+ sphinx/writers/xml.py: note: In member "translate" of class "PseudoXMLWriter":
+ sphinx/writers/xml.py:52:23: error: Item "None" of "document | None" has no attribute "pformat"  [union-attr]
+ sphinx/writers/manpage.py:28: error: Unused "type: ignore" comment  [unused-ignore]
+ sphinx/writers/manpage.py: note: In member "translate" of class "ManualPageWriter":
+ sphinx/writers/manpage.py:34:43: error: Argument 1 to "NestedInlineTransform" has incompatible type "document | None"; expected "document"  [arg-type]
+ sphinx/writers/manpage.py:38:9: error: Item "None" of "document | None" has no attribute "walkabout"  [union-attr]
+ sphinx/builders/xml.py: note: In member "_translate" of class "XMLBuilder":
+ sphinx/builders/xml.py:90:34: error: Incompatible types in assignment (expression has type "NodeVisitor", variable has type "XMLTranslator")  [assignment]

[srittau]

See my comment about visit methods in #14234: We should probably just add them to NodeVisitor with standard types and leave them alone in sub-classes (unless those sub-classes do anything fancy with them).