Feature request: add void AppendFormatted<T>(ReadonlySpan<T> value, int alignment = 0, string? format = null) overload

[petrroll]

For generic wrappers around Utf8StirngInterpolation it'd be very nice if there was this overload. It should be fairly possible as void AppendFormatted<T>(T value, int alignment = 0, string? format = null) is already there.