gh-153357: Add object-oriented MinHeap and MaxHeap classes to heapq

[Twix1288]

This PR adds the MinHeap and MaxHeap classes to the heapq module to provide an object-oriented interface over the existing heap functions.

This resolves issue #153357.

Changes:

• Added MinHeap and MaxHeap to Lib/heapq.py with __slots__ = ('_heap',) for memory efficiency.
• Implemented push, pop, pushpop, and replace to delegate to the highly optimized underlying functions.
• Added standard object methods including peek(), clear(), __len__(), __bool__(), __contains__(), __iter__(), and __repr__().
• Comprehensive test suite updates in test_heapq.py using mixins to verify behavior against both pure Python (py_heapq) and C (c_heapq) underlying implementations.
• Updated Doc/library/heapq.rst with class documentation and an explicit note about __iter__ and __repr__ yielding raw array elements rather than fully sorted output.

• Issue: Add MinHeap and MaxHeap classes to heapq (object-oriented interface) #153357

[Twix1288]

This should work, let me know if any more information is needed!

[picnixz]

There are plently of unrelated changes that should be removed. I would have also waited a bit more for the OP to reply. They may have wanted to do a PR themselves.

[bedevere-app]

Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

[bedevere-app]

Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

[StanFromIreland]

The OP was also assigned to this, please check if someone is working on an issue before taking it on. Closing in favour of their patch.