[C# Dev Kit] Adding an interface file to the project prompts an error 'Naming rule violation: These words must begin with upper case characters: nterface1'

[mikadumont]

Platform	VSCode Version	Extension	Version	Comment
		.NET Install Tool for Extension Authors	v1.6.0	.NET Install Tool for Extension Authors - Visual Studio Marketplace
Windows, Mac M1, Linux	VSCode Insider 1.79.0    VSCode Stable 1.78.2	C# Dev Kit     C# Extension	v0.0.904-alpha v2.0.140	Pipelines - Run 0.0.904-alpha+7cee3ad678 (azure.com)Pipelines - Run 20230518.11 (visualstudio.com)

Repro rate: 100%

Steps to reproduce:

1. Create any project or open the folder including any project.
2. Add an Interface file to the project.

Expect Result:
Adding an interface file to the project does not prompt an error.

Actual Result:
Adding an interface file to the project prompts an error 'Naming rule violation: These words must begin with upper case characters: nterface1'.

[Cosifne]

It's a feature request. (e.g. this matches what's in VS)