* bring back grammar extensions

* fix hygiene

* Revert "pull themes from the marketplace"

This reverts commit 0738f76d.

`xhtm` - is also valid file extension for XHTML files. It is like `htm` and `html` for HTML.

Fixes #101802

These can be better handled by semantic highlighting

it should avoid to have "warning XXX: No license field" during yarn
build
Signed-off-by: NAurélien Pupier <apupier@redhat.com>

and fix hashes.

See https://github.com/Microsoft/TypeScript-TmLanguage/issues/691

Assuming that properties named `label` or `name` are dom properties is incorrect and causes a lot of false positives. This results in weirdly inconsistent colorization