Support markdown_latex_combined from Latex-Workshop

[scimax]

Is your feature request related to a problem? Please describe.
I'm writing myst markdown files in vscode which are build via latex to pdfs. When the language mode is set to markdown, vscode-ltex works as intended. For example in
this sentnce has some errs init.
sentnce and init are marked by ltex and quick fixes are provided. However, Latex-workshop also supports a markdown_latex_combined language mode, which is much more comfortable within the math directives/environments. Using this mode ltex does no longer work.

Describe the solution you'd like
When switching to the language mode markdown_latex_combined ltex should work as well. For the MWE above it should mark sentnce and init and provide quick fixes.

Describe alternatives you've considered
To be honest, I haven't considered an alternative. If there is one which I haven't found yet, I'm open to test it. I would also be open to contribute to vscode-ltex in order to support this mode, if someone could point me in the right direction.

Additional context
Platform:

• Mac OS 26.3.1
• vscode Version: 1.109.5