Fix false-positive matches for glossary terms

[josh-wong]

Description

This pull request fixes the regex logic in the GlossaryInjector component to improve term matching for both Japanese and English text. The changes enhance accuracy by addressing language-specific nuances and edge cases, particularly in cases where part of a word (like ca) shows a tooltip in a longer term (like Scalar).

Related issues and/or PRs

• Related fix: Fix glossary term matching for Japanese docs #882

Changes made

Language-specific term-matching improvements

• Updated the regex pattern for English text to explicitly match singular and plural forms (s and es) at word boundaries instead of using optional groups, improving clarity and accuracy. (src/components/GlossaryInjector.tsxR106-R140)
• Added logic to sanitize matches for Japanese text by stripping non-word characters captured by the regex, ensuring precise term matching. (src/components/GlossaryInjector.tsxR106-R140)
• Refined the matching logic for Japanese text to directly compare sanitized matches with glossary terms, improving reliability. (src/components/GlossaryInjector.tsxR106-R140)
• Adjusted the English text matching logic to use sanitized matches while preserving case-insensitivity and support for plural forms. (src/components/GlossaryInjector.tsxR106-R140)

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have updated the side navigation as necessary.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

N/A