Fix x64 cross-apartment marshaling of IScriptError (Error cast -> E_NOINTERFACE)

[hugo-fc-visions]

On x64, casting ScriptControl.Error to the strongly-typed IScriptError/Error interface fails with E_NOINTERFACE when the object is consumed from a COM MTA thread (e.g. a .NET host whose main thread is MTA):

Unable to cast COM object ... to interface type 'IScriptError' ...
QueryInterface ... IID '{70841C78-067D-11D0-95D8-00A02463AB28}' ...
E_NOINTERFACE (0x80004002)

Root cause: the control is registered ThreadingModel=Apartment (STA). When it is created from an MTA thread, COM returns a proxy, and QueryInterface on that proxy for the IScriptError vtable interface needs marshaling metadata. The type library only declared IScriptControl, never IScriptError, so there was no proxy/stub nor type-library marshaler registered for {70841C78-...} on x64 and the cross-apartment QI failed. (Late-bound/IDispatch access still works because IDispatch is always marshalable; only the strongly-typed vtable cast breaks.)

Fix: declare IScriptError in the .idl (dual + oleautomation, with the exact vtable order and dispids CTScriptError already implements) so it becomes part of the type library. The existing DllRegisterServer -> RegisterTypeLib call then registers an oleautomation marshaler for the interface, and the cross-apartment QueryInterface (and the managed cast) succeed.

No C++ change: CTScriptError already implements the interface (it uses the #import-ed IScriptError, same IID); tsc64.cpp does not include the MIDL header, so there is no type clash.

Code to reproduce using .net 10 console app:

using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

Type scTypeFromPID = Type.GetTypeFromProgID("ScriptControl");
dynamic mssc = Activator.CreateInstance(scTypeFromPID);
mssc.Language = "VBScript";
mssc.ExecuteStatement("lTest = 1");
IScriptError erro = mssc.Error; // throws here

[ComImport]
[TypeLibType(4304)]
[Guid("70841C78-067D-11D0-95D8-00A02463AB28")]
public interface IScriptError
{
    [DispId(201)]
    int Number
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [DispId(201)]
        get;
    }

    [DispId(202)]
    string Source
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [DispId(202)]
        [return: MarshalAs(UnmanagedType.BStr)]
        get;
    }

    [DispId(203)]
    string Description
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [DispId(203)]
        [return: MarshalAs(UnmanagedType.BStr)]
        get;
    }

    [DispId(204)]
    string HelpFile
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [DispId(204)]
        [return: MarshalAs(UnmanagedType.BStr)]
        get;
    }

    [DispId(205)]
    int HelpContext
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [DispId(205)]
        get;
    }

    [DispId(-517)]
    string Text
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [DispId(-517)]
        [return: MarshalAs(UnmanagedType.BStr)]
        get;
    }

    [DispId(206)]
    int Line
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [DispId(206)]
        get;
    }

    [DispId(-529)]
    int Column
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [DispId(-529)]
        get;
    }

    [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
    [DispId(208)]
    void Clear();
}