First of all before peoples misunderstand I am not asking to convert MV to typescript
I am just asking if it's possible to allow me to make a d.ts or a definition files for MV corescript (and later to make a version in typescript who follow the corescript dev alongside.)

Obviously, the reason I say this is that sometime some game dev like me wish to have access to a more strict coding environnement for their game (and obviously are not using plugin because...I know how typescript doesn't like when you edit a class)

so for being simple I would like to make a conversion of the CoreScript (or a definition file ups to you) for the peoples who enjoy programming with typescript.

I will obviously not ask you guys to do it I can Happily do it myself and pull it as a new branch.

The Pros of this are the fact it's offers a stable strict environnment and good debugging
The cons are probably it's may be a little strict when it's come to plugin although it's perfect for Standalone dev
I hope you will like the idea :3