Fix repository typos

[szepeviktor]

• correct spelling mistakes across TypeScript, PHP, documentation, tests, snapshots, changelogs, and theme assets
• rename misspelled source files and update their imports
• add a correctly spelled Yoast search-title filter while retaining the legacy hook
• retain metatada as a typed, deprecated runtime alias for backwards compatibility
• add a typos configuration that documents intentional spellings and makes the checker pass cleanly

using https://github.com/crate-ci/typos

Why

The repository contained genuine spelling mistakes mixed with immutable hashes, captured fixture values, valid non-English words, proper names, and two compatibility-sensitive public spellings. Blindly applying every suggestion would corrupt fixture identity and break existing integrations.

Intentionally retained spellings

Value	Reason
metatada	Deprecated runtime alias retained for backwards compatibility; consumers should use metadata.
tenup_headless_wp_search_title_variables_replacments	Legacy public WordPress filter retained for existing integrations; new code can use tenup_headless_wp_search_title_variables_replacements.
littel	Part of a preserved fixture URL.

[vercel]

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[changeset-bot]

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Latest commit: 8d683ec

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