Refactor Heap Sort Implementation

[sozelfist]

Description

• Implement generic heap sort that can sort arrays in both ascending and descending order.
• Parametrized tests using macros
• Add file and function docstrings.

Type of change

• Refactor old implementations

Checklist:

• [x] I ran the below commands using the latest version of rust nightly.
• [x] I ran cargo clippy --all -- -D warnings just before my last commit and fixed any issue that was found.
• [x] I ran cargo fmt just before my last commit.
• [x] I ran cargo test just before my last commit and all tests passed.
• [x] I added my algorithm to the corresponding mod.rs file within its own folder, and in any parent folder(s).
• [x] I added my algorithm to DIRECTORY.md with the correct link.
• [x] I checked COUNTRIBUTING.md and my code follows its guidelines.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.78%. Comparing base (1bd27f5) to head (9b73940).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #705      +/-   ##
==========================================
- Coverage   94.79%   94.78%   -0.01%     
==========================================
  Files         298      298              
  Lines       22177    22161      -16     
==========================================
- Hits        21022    21006      -16     
  Misses       1155     1155              

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[sozelfist]

Can you please have a look at this PR, @vil02?

[sozelfist]

Thanks! Your suggestion is more concise and definite.