Add `Mirror a Binary Tree` solution (#9534)

* Add `Invert a Binary Tree` solution

* Add type

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* Add `doctest`

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Add `test` to `get_tree_inorder`

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* Add `test` changes

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* Fix lint errors

* Fix precommit errors

* Update and rename invert_binary_tree.py to mirror_binary_tree.py

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <[email protected]>