This PR brings basic functionality for C# method params in the source generator. Basically supporting methods like this:

[LuaMember]
public static LuaTable ParamsMethod(params LuaValue[] arguments)
{
    var table = new LuaTable(arguments.Length, arguments.Length);
    for (int i = 0; i < arguments.Length; i++)
    {
        // lua starts at 1
        table[i + 1] = arguments[i];
    }

    return table;
}

I tested this use case and tried to not break anything else while doing it. I cannot confirm that all use cases are covered. I will try other use cases too in the future. Please see this as a proof of work and not a fully fledged feature.

I'm implementing this because my Lua integration needs this feature. I'm testing this PR in my project and will apply further fixes if necessary.