LuaValue's internal TryRead(Type) methods should be public #191

It would be nice to have a fast-lane access to the typed values as opposed to having only TryRead. Unfortunately those are all marked internal.

More often than not I know I'll be reading a number so I'd really like to use TryReadNumber etc instead (copied from LuaValue) since that's much more streamlined and faster at scale:

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    internal bool TryReadNumber(out double result)
    {
        if (Type == LuaValueType.Number)
        {
            result = value;
            return true;
        }

        result = default!;
        return false;
    }