Use `vue-typescript` (from Volar) for supporting vue, instead of directly using sfc compiler

I was looking for a solution for #40, and I asked in the Volar Discord channel. and the main developer told me that:

johnsoncodehk — 06/13/2022 I see, they could consider using vue-typescript instead So they do not need to handle SFC parsing and edit range mapping.

Shayan.To — 06/13/2022 Does vue-typescript also support vue 2?

johnsoncodehk — 06/13/2022 If just for organize imports, yes

So it seems like you can entrust the work of parsing and modifying Vue file to vue-tsc project.

[johnsoncodehk]

It’s here: https://github.com/johnsoncodehk/volar/blob/4e6f6f77c589e39c1139a323fa75a7633eceadc4/packages/vue-typescript/src/types.ts#L9-L22

But getVueCompilationSettings() { return {} } is good enough for use the organize imports api.

[johnsoncodehk]

@Shayan-To Yes please open an issue to Volar repo, repro link is not needed, but please describe current behavior and expected behavior.