add contributor hehelego with a sequence building app

[hehelego]

Summary of changes:

• Add a new contributor component for hehelego.
• Add a sequence buliding application in the new componenet.
• The new contributor agrees to follow the CoC and AI Policy.

[hehelego]

Had to run sbt scalafmt.
Ready to merge now.

[armanbilge]

When I clicked the "check order" button, it is failing. Please check steps 5 and 6 in the README.

[hehelego]

When I clicked the "check order" button, it is failing. Please check steps 5 and 6 in the README.

Thanks for the feedback. I cannot make sense of the order validation logic but managed to pass the order check with a manual binary search :P

The last commit should fix the problem.

[hehelego]

Merged the main branch into my branch and resolved the merge conflict.

[armanbilge]

I cannot make sense of the order validation logic

It's random 😆 binary search is the right way to do it, nice job!