Sync matrix

[mk-mxp]

• [ ] Run bin/configlet sync -u -e matrix --yes --docs --filepaths --metadata --tests include (updates the Markdown files and maybe tests.toml)
  • docs: instructions unsynced: matrix
  • metadata: unsynced: matrix
• [ ] Drop strict types comments from test file and example code (these are useless)
• [ ] Add and sync test meta data to tests (uuid in DocBlocks / #TestDox())
• [ ] Add exercise to bin/auto-sync.txt to keep it in sync (keep the file alphabetically sorted)
• [ ] Decide on adding / adjusting / ordering test cases to match current problem specs
  • matrix: missing 8 test cases

Do not redesign the student's interface or add test cases that would invalidate existing community solutions. These are extra tasks, which should be discussed in advance.