Extract the Wi-Fi QR share card into its own omarchy.wifiqr panel plugin (#6598)

* Extract the Wi-Fi QR share card into its own omarchy.wifiqr panel plugin

omarchy-network-qr now leads with an iface/security/ssid meta line, so a
bare summon self-detects the connection and the plugin owns the whole
share flow. The network panel loses its overlay lifecycle: with no
centered card left inside it, the shadowed open/close collapses back to
the stock panel behavior, and the QR button just summons the plugin --
which a clone or third-party plugin can replace, like the speed test.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Keep canceled QR and password runs from leaking into their replacements

Copilot review: the cancellation guards dropped in onExited while the
canceled run's collectors were still allowed to fire, so a stale stderr
could shadow a successful regeneration and a stale password could be
revealed under a new network's card. The guards now stay up until the
next run launches, good output settles any earlier error, and a bare
re-summon no longer inherits the previous card's SSID.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

shell/plugins/panels/network/manifest.json

@@ -4,7 +4,7 @@
   "name": "Network",
   "version": "1.0.0",
   "author": "Omarchy",
-  "description": "Wi-Fi list, connection state, and QR sharing",
+  "description": "Wi-Fi list and connection state",
   "kinds": [
     "bar-widget"
   ],
@@ -13,7 +13,7 @@
   },
   "barWidget": {
     "displayName": "Network",
-    "description": "Wi-Fi list, connection state, and QR sharing",
+    "description": "Wi-Fi list and connection state",
     "category": "Network",
     "allowMultiple": false
   }