Document GlobalScope flag and expected use cases

[isc-tleavitt]

Should go in the wiki.

[isc-dchui]

From IPM meeting on 1/27/26:

Full set of things to document:

• Default mapping behavior on installation
• What GlobalScope is, when and how to use it
• How to automate mappings to ACMELIB database, %ALL namespace (similar to what Ready already does) using - probably CPF merge, possibly Mappings element in module.xml?