Add type support

[xgwang-scienceos]

This change is to fix #4

Before the fix, we see import type error:

After the fix, we see error is gone:

Tests still pass:

How does this change work?

1. added a tsconfig.json file including ts, js and svelte files
2. configured vite to use dts from vite-plugin-dts to generate types

[xgwang-scienceos]

@marta-ko @olgatash Could you help taking a look at this PR? Thanks!

[xgwang-scienceos]

Hi @Zwillinge, could you help taking a look at this PR? Thanks!

[Zwillinge]

I'm not sure that we can incorporate this right now. As far as I can see, the issue does not block Grid from using. The generated types are not that useful (just default SvelteComponent-s). For future versions we can consider full-scale typescript support, but we need to work it out for the whole SVAR framework

[xgwang-scienceos]

I'm not sure that we can incorporate this right now. As far as I can see, the issue does not block Grid from using. The generated types are not that useful (just default SvelteComponent-s). For future versions we can consider full-scale typescript support, but we need to work it out for the whole SVAR framework

That makes sense! What is the current status for full-scale ts support? Is it already started? If not && you need extra set of hands, I'm willing to help