Heapsort

[amanda-ariyaratne]

Description

Add heap sort python implementation
Update heap sort documentation

Fixes: #23

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• I have optimized the import, on pycharm it can be done using ctrl + alt/option + o
• I have used Black for Code Formatting, this enhances code readability.
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

NOTE

Please assign @ramanaditya or other maintainers for code review.

[amanda-ariyaratne]

@ramanaditya Let me know if anything needs to be changed