Curly brace complrtion doesn't work in string interpolation is razor

[DoctorKrolic]

Version used: VS 2022 v17.3 Preview 2

To reproduce:

1. Create Blazor server app
2. Go to any component
3. In any method of this component write var str = $"";
4. Put your cursor between quotes
5. Type {

Expected behavior: } as automatically inserted

Actual behavior: Nothing is automatically inserted:

Additional context: For C# all works fine:

[ryanbrandenburg]

This is because our LanguageConfigurationJson deliberately does not encode all the C# rules. We're not sure exactly what the fix here would be, but are open to a PR.