feat(utils): implement dual-field normalization for tags and contributors
Complete rewrite of normalization functions supporting dual-field architecture:
Display field functions:
- NormalizeTags: Titlecase, trim whitespace, case-insensitive dedup
- NormalizeContributors: Preserve original casing/punctuation, dedup
Search field functions:
- NormalizeTagsSearch: Lowercase, remove punctuation, dedup
- NormalizeContributorsSearch: Lowercase, remove punctuation, dedup
Helper functions:
- titlecase: Converts to title case preserving hyphenation
- removePunctuation: Strips punctuation for search normalization
This enables case-insensitive, punctuation-free search while preserving
user's original formatting for display.
john-okeefe
c955f6a518