Please provide a Source Generator that generates an implementation of ICommandHandler.

[aetos382]

I would like a Source Generator that supports implementing ICommandHandler like DragonFruit.

For example, for the following code,

partial class CommandHandler
{
    [CommandHandler]
    Task<int> Handle(
        int foo)
    {
        // command handling
    }
}

generates following implementation.

partial class CommandHandler : ICommandHandler
{
    public Task<int> InvokeAsync(InvocationContext context)
    {
        var fooOption = context.ParseResult.CommandResult.Command.Options
            .SingleOrDefault(static option => option.Name == "foo");

        var fooValue = context.ParseResult.GetValueForOption(fooOption);

        return this.Handle(fooValue);
    }
}

The above code is for a very simple case; more considerations are needed for what actually works.