Add variable names to tl types command

[Kanashimo]

Hello, I have been using Teal for the past few days now. I've thought about adding one small feature that would improve DX, vscode-teal uses tl types command for getting the content of hover tooltip.

I think it would be much better if instead of displaying

function(string)

it would be something like this:

local function hello(name: string)

For now, it's hard to read, especially for functions with many parameters.

I'm not sure how tl types works but when I do tl types hello.tl | grep function(string) I get

"str":"function(string)",

so this property needs to be changed or another one could be added, so later on me or someone else could add that in vscode-teal.

Basically, this feature could be implemented in the extension, but this solution makes it reusable by other tools as well.

That's all, I would like to add that Teal is an awesome project and I hope it will become only better and better through time.