[MooreToCore] Add multibit DetectEventOp support

[AndreyVV-100]

Hi! This PR add support for such code:

module Mod(input [1:0] a, output logic b);
always @(a)
    b <= a[0];
endmodule

I'm not sure about correctness of this code in common case due to #7925 but now (as I understand) only [width-1:0] arrays supported in Moore dialect.

Thank you in advance!

[fabianschuiki]

Looks good to me! Thanks a lot for fixing this 🥳, really appreciated. Let me know if you'd like to merge this yourself once CI passes, or whether you'd like me to land this PR for you 🙂

[AndreyVV-100]

Looks good to me! Thanks a lot for fixing this 🥳, really appreciated. Let me know if you'd like to merge this yourself once CI passes, or whether you'd like me to land this PR for you 🙂

I will be grateful if you land this PR.