general/drills: Add "Distributed system" written task as exam

[vladiouz]

Prerequisite Checklist

• Read the contribution guidelines regarding submitting new changes to the project;
• Tested your changes against relevant architectures and platforms;
• Updated relevant documentation (if needed).

Description of changes

[github-actions]

Published at https://cs-pub-ro.github.io/operating-systems/54/

[teodutu]

Address my inline comments and then:

• Set your email properly as explained here [1]. It appears weird in your commit signatures: Signed-off-by: Petru-Vlad Ionescu <[email protected]>
• Squash your commits into a single one using git rebase -i main. This will open your default editor and you'll see your 3 commits. Leave the first line unchanged, then replace the word "pick" with "s" (from "squash") in the other 2 lines. Then a new menu will open where you'll be able to reword your commit message. Edit it as you wish. When making further changes, just git commit --amend --no-edit to add them to the already existing last commit and then git push -f to overwrite it remotely. This way you'll keep this PR as 1 commit.

[1] https://github.com/cs-pub-ro/operating-systems/blob/main/CONTRIBUTING.md#commits

[teodutu]

The content is good. Before we merge this, set your email address on GitHub so that it matches the one in the commit signature. After that, run git commit --amend --no-edit to update the commit with no additional changes and git push -f to re-trigger the CI/CD. Otherwise checkpatch fails: https://github.com/cs-pub-ro/operating-systems/actions/runs/8221132857/job/22481137592?pr=54#step:3:568