This fixes cases where fuzzy matching would return a better score for
a different pattern than a needle perfectly matching the haystack.
As an example, when searching for "fire" in emojis, "Fire Engine" would
have scored 168, while "Fire" was giving only 160.
This patch makes the latter have the best possible score.
Previously, the first match index was not checked to see if the camel
case or separator bonuses applied. The camel case bonus could also be
incorrectly applied where strings had non-alphabetical characters.
A lot of places were relying on AK/Traits.h to give it strnlen, memcmp,
memcpy and other related declarations.
In the quest to remove inclusion of LibC headers from Kernel files, deal
with all the fallout of this included-everywhere header including less
things.
A StringView is sufficient here. This also removes the declaration of
fuzzy_match_recursive from the header, as it's only needed from within
the implementation file.
