chore: cleanup gitpod setup

[vil02]

Type of change

This PR cleans up the gitpod setup. @siriak please have a look.

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.

Please make sure that if there is a test that takes too long to run ( > 300ms), you #[ignore] that or
try to optimize your code or make the test easier to run. We have this rule because we have hundreds of
tests to run; If each one of them took 300ms, we would have to wait for a long time.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.02%. Comparing base (2545e0e) to head (7230395).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #736   +/-   ##
=======================================
  Coverage   95.02%   95.02%           
=======================================
  Files         303      303           
  Lines       22577    22577           
=======================================
  Hits        21454    21454           
  Misses       1123     1123           

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