Discover sensor bundles from the SDK catalog, not a product list

The picker listed a hard-coded product list and treated any *.json beside sensor.json as a
configuration, so a folder of stray JSON could be offered as a sensor. Discovery now scans the
shipped root and a writable user root beside it, keeps the SDK's verdict for every entry
(listing rejected ones with their reason) and flags duplicate profile_ids instead of shadowing
them; verified by shared/tests and apps/studio/tests.

apps/studio/config/locales/en_US.json

@@ -179,7 +179,10 @@
     "export_none": "No coefficients exported yet",
     "export_file": "file {name} ({size} KB, {time})",
     "export_identity": "file identity  type {sensor_type} · SN {sn} · config {config}",
-    "thumb_placeholder": "Product model"
+    "thumb_placeholder": "Product model",
+    "family_unidentified": "Unidentified",
+    "catalog_profile": "Profile {profile_id} · family {family} · from {origin} · {state}",
+    "catalog_blocked": "Cannot start: {reason}"
   },
   "panels": {
     "arrow": "2D image",