I'm trying to format .mongo files in VS Code using prettier/prettier-vscode extension as explained in my PR prettier/prettier-vscode#1009

Here is an example of a .mongo file (it is valid javascript) :

db.users.find({ someField: { $exists: true } });

These files are created by Azure Cosmos DB, an extension for VS Code. Renaming them to .js files doesn't work for me, because then I cannot run the query to the DB, it only works for files with the extension .mongo.

VS Code seems to treat mongo as a different language from javascript or typescript. I would love to open a PR to add support for .mongo files in Prettier : can someone give me a general direction? I'm new to the Prettier codebase.