include SCRX9 and GFM DLL model in OpenIPSL

This is initial commit for adding DLL controller into OpenIPSL. Need to verify with professor Luigi about the package placement. If the placement is good I will go ahead include some documentation for both SCRX9 and GFM. Currently the controller is place under OpenIPSL/Electrical/Control/IEEE_CIGRE; The tests are placed under OpenIPSL/Tests/Controls/IEEE_CIGRE. All the tests are verified working on my laptop.

Co-Authored-By: Luigi Vanfretti <7248948+lvanfretti@users.noreply.github.com>

Author: embeddedhao

OpenIPSL/Electrical/Controls/CGMES/ES/ExcSEXS.mo

@@ -1,4 +1,4 @@
-within OpenIPSL.Electrical.Controls.CGMES.ES;
+within OpenIPSL.Electrical.Controls.CGMES.ES;
 model ExcSEXS "CGMES Simplified Excitation System Model"
   extends OpenIPSL.Electrical.Controls.PSSE.ES.BaseClasses.BaseExciter;
   parameter Real T_AT_B=0.1 "Ta/Tb - gain reduction ratio of lag-lead element";

OpenIPSL/Electrical/Controls/IEEE_CIGRE.mo

@@ -147,8 +147,7 @@ equation
           extent={{-74,148},{76,52}},
           textColor={28,108,200},
           textString="WEHGOV
-"), Text(
-          extent={{-62,68},{-4,52}},
+"), Text( extent={{-62,68},{-4,52}},
           textColor={28,108,200},
           textString="SPEED"),
         Text(

OpenIPSL/Electrical/Controls/IEEE_CIGRE.new-mo

@@ -2,3 +2,4 @@ CGMES
 PSAT
 PSSE
 Simulink
+IEEE_CIGRE

OpenIPSL/Electrical/Controls/PSSE/TG/WEHGOV.mo

@@ -1,3 +1,4 @@
 CGMES
 PSAT
 PSSE
+IEEE_CIGRE