Expose dict view types in ``types``

Feature or enhancement

Proposal:

Expose the items, keys, and values types in the types module. See dictionary view objects. These correspond to the ItemsView, KeysView, and MappingView view types in collections.abc.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

• #30629
• #30630

Linked PRs

• gh-132761

首先定位 types 模块，并将其暴露的名称与 collections.abc 中的 ItemsView、KeysView 和 MappingView 类型进行比较。开始前查看链接的 PR gh-132761；完成标准是三个字典视图类型从 types 暴露，并且相关测试通过。