Added 4 digit 7seg display module (confirmed working for now),

Added Inputs for displaying registers / Program Counter high and low bits,
Assigned pins for Display digits, inputs (Labeled HID) and the clk button

modules/rom.sv

@@ -21,3 +21,4 @@ module rom #(parameter m=7,p=4) (
 endmodule // end rom module
 
 `endif
+