feat(boolean_algebra): add half adder Implementation

[Ranjita1708]

Describe your change:

• [x] Add an algorithm?

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.
• [ ] 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.
• [ ] All function parameters and return values are annotated with Python [type hints]).
• [x] All new algorithms include at least one URL that points to Wikipedia or another similar explanation. ".

[Ranjita1708]

could you please check the half adder implementation