Added Hexadecimal To Decimal Conversion

[Adin3]

Added Hexadecimal to Decimal Conversion

the function takes a string slice that represents the hexadecimal number in string format and returns Result<u64, &`static str>

The function checks if the string slice is either empty or contains characters that cannot represent a hexadecimal number. In this case, the function will exit with Result::Err(error_message)

the function uses u64::from_str_radix() for the conversion of &str in base 16 to an u64.

If the function succeeds, it returns Result::Ok(decimal_number)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Fixed one line in bingo_sort after a warning was caught by `cargo clippy --all -- -D warnings
• (checked afterward the unit tests, and everything was alright)
• New feature (non-breaking change which adds functionality)
• Added Hexadecimal To Decimal Conversion

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

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (cb3b21d) 94.57% compared to head (6d4bbaf) 94.62%.
Report is 3 commits behind head on master.

Files	Patch %	Lines
src/conversions/hexadecimal_to_decimal.rs	97.87%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #657      +/-   ##
==========================================
+ Coverage   94.57%   94.62%   +0.04%     
==========================================
  Files         285      287       +2     
  Lines       22906    22999      +93     
==========================================
+ Hits        21664    21762      +98     
+ Misses       1242     1237       -5     

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[siriak]

Looks good, thanks!