Added tournament sort algorithm

[remememe]

Description

Implements tournament sort algorithm.
https://en.wikipedia.org/wiki/Tournament_sort

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

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

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.83%. Comparing base (7789289) to head (5869655).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1046   +/-   ##
=======================================
  Coverage   95.82%   95.83%           
=======================================
  Files         393      394    +1     
  Lines       29971    30035   +64     
=======================================
+ Hits        28721    28785   +64     
  Misses       1250     1250           

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