disable two comparer test that fail in latest safari, https://github.com/microsoft/vscode/issues/111368 fyi @bpasero

This change fixes issue #99955

When comparing file and folder names, after grouping  by type if applicable, compare the full name all at once instead of separately
comparing the name and the extension.

This change makes filename comparisons work the same as they
do in the Mac File Explorer and the same as a standard locale-based
sort with the numeric option (a form of natural sort) enabled.

Windows File Explorer has a different sort order due to treating the
dot character differently. Many terminal programs and sites like
github also differ, using a unicode-sort instead of a locale-based sort.

Partially addresses issue #27759

Adds compareFileNamesNumeric() and compareFileExtensionsNumeric()
funcitons, and uses the new functions in explorer view.

Fixes the following edge cases:

1. Sorts the same name with different case in locale order (a < A) instead of
unicode order (A < a).
2.  Sorts the same name with different accents or diacritics by locale
(á < à) instead of in unicode order (à < á) .
3. Sorts names that are equivalent in a numeric locale comparison
as shortest numeric representation first (1 < 01 < 001) instead of
unicode order (001 < 01 < 1).
4. For filenames with a name plus an extension, compares names first
fand then compares extensions (aggregate.go < aggregate_repo.go)
instead of comparing the whole name at once
(aggregate_repo.go < aggregate.go)
5. Treats dotfiles (filenames that start with a dot) as filenames
without extensions, instead of either as an empty filename plus
an extension (single-dot dotfile), or a filename that starts with a
dot plus an extension (multi-dot dotfile).  This means all dotfiles
group together in their own section when sorting by file type,
(.eslintignore < .eslintrc.json < file.cs < file.js < file.json) instead
of being interspersed between files grouped by type
(file.cs < .eslintignore < file.js < .eslintrc.json < file.json).

Note: other areas of workbench may benefit from the new functions
as well but only explorer has been changed so far.

* Manually added strict null checks in around 70 files

* Fixed tsconfig.strictNullChecks.json merge fail

* Touched up a few unnecessary type changes

* Removed files already in other PRs

We set alwaysStrict so this directive is not needed

* Make listing directories first an option #29329

* Added refresh on `dirsFirst` config value changed

* Switch sorting configuration to enum

* Added `filesFirst` sorting

* Added sorting by type

* Got rid of the `path` dependency

* Added sorting by last modified date

* Merge conflict fix

* `modified` sorting order changed to descending

* New compareFileExtensions comparer added for TypeSorter

* Switched to a single self-contained explorer sorter

* Improved description of 'explorer.sortOrder' config option