Sync nucleotide-count

[calvinli08]

Issue: #925

• Run bin/configlet sync -u -e nucleotide-count --yes --docs --filepaths --metadata --tests include (updates the Markdown files and maybe tests.toml)
  docs: instructions unsynced: nucleotide-count
• 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

Note

This is my first PR, apologies in advance for any mistakes.

[github-actions]

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

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[mk-mxp]

Thanks for taking this exercise a step further!