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

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

debt - remove suggest adapter and use CompletionItemProvider from modes.ts. Also fixes https://github.com/Microsoft/monaco-editor/issues/985

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

when the 'query' string is getting longer it's save to score afore scored/filtered items only, #15419