Please add the possibility to define multiple locations for symbols.

Current:
{
"al.packageCachePath": "./.alpackages"
}

Idea:
{
"al.packageCachePath": [ "./.alpackages", "./.alpackages/some-extension" ]
}

Why it could help us?
When working on a new extension it would make sense to develop against another extension which is not currently deployed to a docker or sandbox environment.
With such an implementation we could use package managers like npm, yarn, bower to get everything in place to start working.

Alternative:
Search symbols also in the subfolders of /.alpackages.