filters - tweak anyscore for more strictness, add matchesFuzzy2 as faster alternative to matchesFuzzy

We compile using the alwaysStrict flag so these directives are not needed

This part removes most `use strict` directives that are right after the file header

fuzzyScore - allow passing of lower-case variants of things, allow passing of start positions, move whitespace starts to completion model

make fuzzy score more strict and don't treat a match on a subsequent upper case latter as stong match (but as simple match),  #50724

This reverts commit 27256832 which turns out did not break the import of vs/nls

This reverts commit 7de696a2.

Seems to have broken loading vs/nls in at least one case in insiders

Don't use this import form in places where it is not needed. This prevents us from correctly detecting duplicate imports

Comparing `const` with `constructor` and `const` should favor the latter.
Even tho both are prefix matches, the latter is a perfect match and that
should be accounted for.

Requires a build of TS with https://github.com/Microsoft/TypeScript/pull/20547 Fixes #36429

Also relaxes the matching logic for suggestion items with filter texts