feat: Add a new hanging protocol @ohif/mn (#3305)

* feat: Add a new hanging protocol @ohif/mn

* Add @ohif/seg example

* PR comments and a couple more fixes to make things cleaner

* PR comment

* Added an example to cause the PR checks to rerun

platform/viewer/cypress/integration/customization/HangingProtocol.spec.js

@@ -2,7 +2,7 @@ describe('OHIF HP', () => {
   const beforeSetup = () => {
     cy.checkStudyRouteInViewer(
       '1.3.6.1.4.1.25403.345050719074.3824.20170125113417.1',
-      '&hangingProtocolId=@ohif/hp-extension.mn'
+      '&hangingProtocolId=@ohif/mnGrid'
     );
     cy.expectMinimumThumbnails(3);
     cy.initCornerstoneToolsAliases();

platform/viewer/cypress/integration/customization/OHIFDoubleClick.spec.js

@@ -2,7 +2,7 @@ describe('OHIF Double Click', () => {
   beforeEach(() => {
     cy.checkStudyRouteInViewer(
       '1.3.6.1.4.1.25403.345050719074.3824.20170125113417.1',
-      '&hangingProtocolId=@ohif/hp-extension.mn'
+      '&hangingProtocolId=@ohif/mnGrid'
     );
     cy.expectMinimumThumbnails(3);
     cy.initCornerstoneToolsAliases();