The Slayer plugin highlights target monsters based on their name rather
than NPC ID, as many common monsters (skeletons, zombies, etc.) have
nearly endless variations for different models and combat levels.
Previously, this name matching was done via a simple
`String#contains()`, which led to some incorrect matches such as pirates
being highlighted while on rat tasks and Jonny the beard being
highlighted while on bear tasks.
This commit changes matching to use regex to match string boundaries or
whitespace at either end of the task string, ensuring these substring
matches can only happen when word breaks occur. The only known existing
case where this would apply is for baby dragons and brutal dragons,
which are valid alternatives for their respective chromatic dragon
tasks.
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