Synchronize the fixes from #1936, #1824, and #1961 across translated editions and normalize C# and Dart formatting. Move Java CI to Ubuntu 24.04 so its Java 11/17 checks can run.
Replace the exercise pages' Python-only snippets with source-backed implementations for the 13 visible programming languages, and localize reader-facing comments by site language. Zig remains out of scope.
Approval bypass: repository protection requires one approval but does not enforce it for administrators. All 68 completed checks succeeded; four non-required Java jobs remained queued on the existing ubuntu-20.04 workflow, with no failed checks.
* A bug fixes
* Sync zh and zh-hant versions.
* Fix a question in chapter_array_and_linkedlist/summary.md
* Optimize a definition in what_is_dsa.md
* Fix the Contributing guidelines for Chinese-to-English.
* Add a q&a in chapter_array_and_linkedlist/summary.md
* Sync zh and zh-hant versions.
* Update .gitignore
* Sync zh and zh-hant versions.
* Add Ruby and Kotlin icons
Add the avatar of @curtishd
* Update README
* Synchronize zh-hant and zh versions.
* Translate the pythontutor blocks to traditional Chinese
* Fix en/mkdocs.yml
* Update the landing page of the en version.
* Fix the Dockerfile
* Refine the en landingpage
* Fix en landing page
* Reset the README.md