main
+ guides/uv: uv install via pipx, venv, sync requirements;
+ contributing, guidelines: gitverse, forks, by languages;
* dz_general: url to fork update added;
* dz_git.md: link to new fork update doc;
* print_students: moved to lesson4, another lesson moved to old;
* docs/guides/update_fork: branch backup verified command;
+ guides/uv: apt update typo fix;