Make spelling test author-only

[salva]

Summary

Make the spelling test author-only and add the missing stopwords observed during review.

Changes

• Skip t/pod-spell.t unless AUTHOR_TESTING is set.
• Add stopwords for X11, didn, and doesn.
• Add the tracked spelling test to MANIFEST.

Fixes #52.

Testing

• perl -Ilib t/pod-spell.t
• AUTHOR_TESTING=1 perl -Ilib t/pod-spell.t

[Copilot]

Pull request overview

This PR reduces environment-related flakiness in the distribution’s default test run by making the POD spelling check an author-only test, while also updating the stopword list to match words observed failing in real environments.

Changes:

• Gate t/pod-spell.t behind AUTHOR_TESTING to avoid running it in normal prove/CPAN tester runs.
• Add stopwords for X11, didn, and doesn to address the known failures.
• Add t/pod-spell.t to MANIFEST so it’s tracked in the release file list.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
t/pod-spell.t	Skips unless AUTHOR_TESTING is set; expands stopwords to cover observed failures.
MANIFEST	Adds t/pod-spell.t to the distribution manifest.

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