Similar to `_get_path_for` but for only type names.

def _get_path_for_type(type_):
    """Similar to `_get_path_for` but for only type names."""
    if type_.lower() in CORE_TYPES:
        return Path('index.html#%s' % type_.lower())
    elif '.' in type_:
        namespace, name = type_.split('.')
        return Path('types', namespace, _get_file_name(name))
    else:
        return Path('types',  _get_file_name(type_))