Add CI pipeline workflow to check for TypeScript errors

[seancolsen]

From what I can tell, we don't have any continuous integration checks in place to verify the absence of TypeScript errors.

I think we need to add:

• svelte-check to check *.svelte files
• tsc --noEmit to check *.ts files

Does that sound good, @pavish?

[pavish]

@seancolsen We could configure svelte-check to also check ts files by passing the tsConfig file to it. Refer --tsconfig option in docs.

I'm not sure if this might introduce other issues, in which case we can go with tsc --noEmit.