Add glob support for custom file type language

[farayolaj]

Release Notes:

• Added glob support for file_types configuration (#10765).

file_types can now be written like this:

"file_types": {
  "Dockerfile": [
    "Dockerfile",
    "Dockerfile.*",
  ]
}

[farayolaj]

Regarding the comment to remove the Option wrapper as seen here, I think it'll affect uses of the function where user_file_types can be empty as seen here. In such cases, an empty hash map will need to be passed. So I have left the Option wrapper there for now.

[osiewicz]

Thanks for your first contribution! This looks good to me; once you fix up the formatting (per https://github.com/zed-industries/zed/actions/runs/9151859199/job/25166477766?pr=12043), I think we're gonna be in a good spot to merge this.