Add Euclidean Distance

[cyrixninja]

Description

Implemented Euclidean Distance Algorithm in Rust.

References -
https://the-algorithms.com/algorithm/euclidean-distance
https://en.wikipedia.org/wiki/Euclidean_distance

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 ✅

Comparison is base (0c2f4d9) 94.40% compared to head (a32eb47) 94.40%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #610   +/-   ##
=======================================
  Coverage   94.40%   94.40%           
=======================================
  Files         268      269    +1     
  Lines       21824    21850   +26     
=======================================
+ Hits        20602    20628   +26     
  Misses       1222     1222           

Files	Coverage Δ
src/math/euclidean_distance.rs	100.00% <100.00%> (ø)

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[siriak]

Looks good, thanks!