OPTIONAL_BUNDLES in app-boot lists the bundles the installation ships
switched off; the plugin manager, the default-product isolation gate,
the workspace constraints, and the packed-install check read that one
list instead of a dsh.optionalBundles field in apps/cli/package.json.
The dsh installation lists under `dsh.optionalBundles` the bundles it
ships for a person to switch on. The plugin manager reports them as
`optional`, and the Web plugin page shows them first, in a built-in
group with an official tag, off until selected and never removable.
Agent Teams ships this way, so a blank profile offers both of its
layers. Default-product isolation, the workspace constraints, and the
packed-install check accept that one dependency edge and nothing else
experimental.
A bundle's title and one-liner come from `dsh.title` and the new
`dsh.description`, else from the package name and `description`. A
dependency without a bundle patch is no longer listed unless the
profile selects it. The install dialog asks for a package name or
address; a guide under the field shows the three accepted forms with
an example each and ends in a security warning, and the copy no longer
speaks of a plugin ID.
yudshj