Allow to specify language id in command to create a new untitled file

[karrtikr]

This PR fixes #152920

@bpasero @lramos15 Unfortunately this does not seem to be working even if I hardcode the language id as "python", would be needing some help here.

[bpasero]

Looks good to me from editor service, i.e. when I run this code it opens a Python file:

editorService.openEditor({
	resource: undefined,
	options: {
		override: undefined,
		pinned: true
	},
	languageId: 'python',
});

[karrtikr]

Ah, actually for some reason the builder was not compiling my changes incrementally, which is why I got the impression it's not working. Does it not watch for changes by default?

I can confirm it works as well. I'll test out if walkthrough works as expected.

[lramos15]

Does it not watch for changes by default?

It should but depends how you build. I just use yarn watch in my terminal and then using the "Launch VS Code" debug entry

[karrtikr]

Can confirm it works from welcome view 👍

It should but depends how you build. I just use yarn watch in my terminal and then using the "Launch VS Code" debug entry

I see, I used the default build command Ctrl+Shift+B. The daemon watch process launched seems to exit automatically after a while.

[lramos15]

Just a small nit

[lramos15]

Can we set this name to be something meaningful now that it's not just view type