Add support for typedefs internal to cppclasses

[chrhansk]

This should enable class-internal typedefs:

cdef cppclass Example[T]:
    ctypedef T LocalAlias

As an aside: The repository contains several auto-generated files (src/parser.c, src/node-types.json, src/grammar.json) which make for large diffs. Could these by any chance be removed?

[b0o]

Looks good, thank you!

As an aside: The repository contains several auto-generated files (src/parser.c, src/node-types.json, src/grammar.json) which make for large diffs. Could these by any chance be removed?

Yeah, it's a bit unfortunate, but that's the standard way tree-sitter parser repos are handled, for example:

• https://github.com/tree-sitter/tree-sitter-python/blob/master/src/parser.c
• https://github.com/tree-sitter/tree-sitter-javascript/blob/master/src/parser.c