Does not respect .clang-format-ignore

[ember91]

.clang-format-ignore files are not respected with this extension. They are similar to .gitignore files and describe which files should not be formatted.

Note that I'm pointing to a custom clang-format release using "clang-format.executable" in the .code-workspace file. My clang-format has version 18.1.5. It has been tested without going through xaver.clang-format and it does respect .gitignore in that case.