Add: Smart-case functionality and ignore-case to CocList fuzzy search

[psacawa]

"Smart-case" search means that if the search term is all lowercase, then the search will be case-insensitive. If there is any upper-case character, then the search is case-sensitive. Therefore,

"Foo" doesn't match "fooBar", but "foob" does match "FooBar", and "FooB" does match "FooBar".

At the moment, no tests.

Available via e.g.

CocList --smart-case outline

ListOptions interface is modified to achieve this.

Demo