Interface FuzzyMatch

Lightweight fuzzy matcher for inline filtering.

Goals:

• Match characters of query in order (not necessarily consecutive) inside target — same behaviour familiar from VSCode's quick-open or fzf.
• Score higher when matches are consecutive or near the start.
• Case-insensitive.
• Pure + synchronous — no allocations beyond the result.

Non-goals: full fzf parity, Sublime-style heuristics, diacritic folding. If the score function ever needs tuning the entire surface is two small functions; replacing is one diff.

Returns null when there is no match. Returns a positive score otherwise; higher = better.