Fixes #111649: Have the diff editor control `wordWrapOverride1` and the toggle word wrap action `wordWrapOverride2` such that they can function independently

In case of multiple possible longest common substrings, try to give preference to the ones containing the most ammount of text

* Add splitLines helper  function

I noticed there are a lot of places in our codebase what split strings using a hardcoded `/\r\n|\r|\n/` regular expression. This change extracts that to a new `strings.splitLines` helper

* Update snippetSession.ts

This treats tabs faked using spaces as if they were real tabs meaning that you can't select the middle of them.

For #103454

This makes paging behavior by clicking in the scroll bar gutter
optional.

* Adds regex to ignore already closed comment block

* Adds test case for generator method onEnter buggy behavior

_serviceBrand is only used for typing and should not result in emit

Also adds readonly