Add OMP as a built-in importable provider (#1388)

* Support imports from Pi-compatible providers

* Add OMP as a built-in provider

* Address Pi session scanner review

* Restore Pi session import discovery

* Update provider test for disabled OMP

packages/cli/src/commands/provider/ls.ts

@@ -18,7 +18,7 @@ const PROVIDERS: ProviderListItem[] = AGENT_PROVIDER_DEFINITIONS.map((def) => ({
   provider: def.id,
   label: def.label,
   status: "available",
-  enabled: "Enabled",
+  enabled: def.enabledByDefault === false ? "Disabled" : "Enabled",
   defaultMode: def.defaultModeId ?? "-",
   modes: def.modes.length > 0 ? def.modes.map((m) => m.label).join(", ") : "-",
 }));