Hi
I have just recently found the solution, which is also explained in this GUIDE
How to run the CRM My Opportunities Fiori application in WebIDE
hope it helps
if not, you can also try adding
{
"path": "/webapp/resources/sap/cus/crm/lib/reuse/",
"target": {
"type": "destination",
"name": "gw1",
"entryPath": "/sap/bc/ui5_ui5/sap/crm_lib_reuse/sap/cus/crm/lib/reuse/"
},
"description": "CRM Lib Reuse"
},
but this is more of a workaround then the proper way for it to work, I think