Add a setting for custom config files

[ivank]

Add mjmlConfigPath setting mimicking the cli option: https://github.com/mjmlio/mjml?tab=readme-ov-file#inside-nodejs

With this you can set the config to be a js file (.mjmlconfig.js) and thus enable custom templates and preprocessors.

After reading https://thoughtbot.com/blog/building-templated-emails-with-mjml I thought "this is the solution for using handlebars in mjml!!" But when I tried it the vscode extension didn't pick up the .mjmlconfig.js file at all.

Now while I do think mjml should pick that file up if it is available, not just .mjmlconfig, I don't think there should be anything stopping this extension to allow you to set your mjml config file directly. I'm sure it would be useful to lots of people for other purposes too.

I've also published this code in the marketplace https://marketplace.visualstudio.com/items?itemName=IvanKeirn.vscode-mjml-custom-path to demonstrate its feasibility.

[iRyusa]

Thanks for this I should be able to ship it with the next release (with MJML5 alpha builtin too 🤞 )

[ivank]

Any news on the release?