cli: Add flag to generate "gi://" declarations
This flag tells gi.ts to generate an extra file with declarations
that GJS will understand. When there's more than one version of
a library, the modules are generated with ?version= appended.
This flag tells gi.ts to generate an extra file with declarations
that GJS will understand. When there's more than one version of
a library, the modules are generated with ?version= appended.