[internal]: fix that there is XML in the doc comments

[mxschmitt]

• fix that there is XML in the doc comments -> it should not be there (was not correct since a few months)
• fix that there are csharp examples in the generated_interfaces.go
• Re-introduce EmulateMedia

[kumaraditya303]

@mxschmitt What XML should be removed, <summary/> from structs ?

[mxschmitt]

@mxschmitt What XML should be removed, <summary/> from structs ?

https://github.com/mxschmitt/playwright-go/blob/master/generated-structs.go

The .NET comment generator should be removed since we want just the text.

[kumaraditya303]

We don't even want cref tags ?

[mxschmitt]

We don't even want cref tags ?

I don't think that's a thing in the Go world, but feel free to verify.

https://blog.golang.org/godoc

[mxschmitt]

Fixed in #173