[Binary Tree] Different views of binary tree added

[kondekarshubham123]

Describe your change:

Problem: Given root of binary Tree, print the

1. binary-tree-right-side-view
2. binary-tree-left-side-view
3. binary-tree-top-side-view
4. binary-tree-bottom-side-view

• [X] Add an algorithm?
• [ ] Fix a bug or typo in an existing algorithm?
• [ ] Documentation change?

Checklist:

• [X] I have read CONTRIBUTING.md.
• [X] This pull request is all my own work -- I have not plagiarized.
• [X] I know that pull requests will not be merged if they fail the automated tests.
• [X] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [X] All new Python files are placed inside an existing directory.
• [X] All filenames are in all lowercase characters with no spaces or dashes.
• [X] All functions and variable names follow Python naming conventions.
• [X] All function parameters and return values are annotated with Python type hints.
• [X] All functions have doctests that pass the automated testing.
• [X] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
• [X] If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[kondekarshubham123]

Hi @cclauss @dhruvmanila,

Can you please review this, hacktoberfest is about to end, if any updates required please let me know.

Thanks

[kondekarshubham123]

Should I added doctests as per suggested by algorithms-keeper ?

[SwaggyRajput]

Hello sir, can u assign me this issue. I would love to grab this opportunity.

[cclauss]

Please stop waiting. We do not assign issues in this repo. Instead, we review pull requests so if you see something that is worth fixing then please create a pull request to fix it. This pull request is already merged.