Made search case insensitive

[Hetarth02]

This PR aims to fix Issue #2373.

[Hetarth02]

@mortenpi Before merging, where do I add the entry in CHANGELOG.md? In version 1.2.1 or any other place?

[fredrikekre]

Vim has smartcase which I have started to like. Basically, if the search query contains at least one upper case letter, then the search is case sensitive, otherwise not. Perhaps that is something to mimic here?

[fredrikekre]

where do I add the entry in CHANGELOG.md? In version 1.2.1 or any other place?

Above 1.2.1 in a new header with ### Unreleased

[3f6a]

Vim has smartcase which I have started to like.

Why not a togglable setting for case-sensitivity? Seems more intuitive.

[LilithHafner]

Honestly, this seems like an upstream bug in mini-search. I would hope that even a very light fuzzy search would fix this, but apparently they use Levenshtein edit distance to compute fuzzy matches which is not a case-aware system (i.e. Editlink and editlink are equally far apart as editWink and editlink).

source: https://lucaong.github.io/minisearch/types/MiniSearch.SearchOptions.html#__type.weights.__type-10.fuzzy-1

I think smartcase seems like a reasonable idea and it's also worth trying out fuzzy: true to see if minisearch's default fuzzy parameters are enough to fix this.

[LilithHafner]

This seems like an unambiguous improvement. LGTM.

Smartcase is certainly an interesting idea to try out, but does not block this PR.

[mortenpi]

LGTM as well, sorry for the delay. Thank you!