make global resources less complex

[evshvarov]

trafficstars

Now if you want to include the global X in resources you need: place the file in: /src/gbl/X.XML

and add the resource: <Resource Name="X.GBL" />

Ideally to have the option to describe globals as XML too, like: <Resource Name="X.XML" /> because it's not clear why the resource is GBL and the file is XML. or support the GBL extension.

[isc-tleavitt]

The intended workflow around this needs better documentation.

[isc-dchui]

Added example in documentation here: https://github.com/intersystems/ipm/wiki/03.-IPM-Manifest-(Module.xml)#globals-resource-example