Function createInstalledApplets

createInstalledApplets(
storage: StorageLike,
now?: () => number,
): InstalledApplets
The applets the user has run, persisted at kernl:installed:v1.

Installing happens when the shell plans a verified applet, so the routing contracts always come from a verified manifest (NAP-INTENT, "Runtime Behavior"). Advertisements are routing hints; they grant nothing.
Parameters
- storage: StorageLike
  Where the list is kept.
- now: () => number = Date.now
  Clock for installedAt.
Returns InstalledApplets
The installed set.
Example
```
const installed = createInstalledApplets(localStorage);
installed.install(summary);
installed.catalog(); // [{ id: 'nip5d:35129:…:notepad', archetypes: { 'text-editor': … } }]
```