Module resolution issue with project reference

### Description

- I use `svelte-check` with a custom --tsconfig path. However, the VSCode extension uses the default one (tsconfig.json)

### Proposed solution

Add an extension configuration to set the tsconfig path.
``` json
"svelte.plugin.typescript.tsconfigPath": "./tsconfig.json"
```

### Alternatives

_No response_

### Additional Information, eg. Screenshots

_No response_