fix: volar ts plugin compatibility

[jasonlyu123]

#2307

1. Improve the svelte project check for InferredProject. Start from the current directory and go down 2 levels in the directory tree to search for package.json. Then we use the directories with package.json to search for svelte modules. If your ts-plugin is no longer enabled, you can create a jsconfig.json where your package.json is. This alone should resolve most problems since the plugin won't be applied at all.

2. Disable the plugin in the config level until we receive the _typescript.configurePlugin request. This should decrease the chance of the project update because of the config toggle.

As for the Debug.assert in ts 5.5 nightly, this happens because ts clears .d.ts loaded by open files in InferredProject. So in non-svelte projects, the .d.ts from svelte might be clear whenever a file is closed. Haven't found a good way to resolve this but a better svelte project detection should already lower the chance happens.

@johnsoncodehk could you check if this resolves the compatibility issues?

[jasonlyu123]

As for the Debug.assert in ts 5.5 nightly, this happens because ts clears .d.ts loaded by open files in InferredProject.

This actually happens in 5.3 as well. It also happens to Svelte projects without tsconfig/jsconfig. We can probably fix it in a separate PR.