Merge branch 'feat/extra-resources' into 'master'

feat: add extra learning resources

See merge request ldricot/lingi2401!393

resources.md

@@ -7,3 +7,9 @@
 ### General open source
 
 - https://www.linuxfoundation.org/
+
+### Learning CLI
+
+- [MIT Missing Semester](https://missing.csail.mit.edu/) An introductory course to equip students with crucial practical skills. [French-only version](https://moodle.uclouvain.be/course/view.php?id=9311)
+- [Linux Jurney](https://linuxjourney.com/) An interactive guide to Linux, it's ecosystems and the CLI
+- [Learn Git Branching](https://learngitbranching.js.org/) An interactive web-based course to learn `git` with the CLI.