feat: initial Polaris Headlamp plugin (v0.0.1)

Sidebar page at /polaris that reads Fairwinds Polaris audit results
from ConfigMap/polaris-dashboard in the polaris namespace. Displays
cluster score, check summary (pass/warning/danger counts), and
cluster info. Caches results with user-configurable refresh interval.
Handles 403, 404, and malformed JSON error states.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -0,0 +1,13 @@
+{
+  "name": "polaris-headlamp-plugin",
+  "version": "0.0.1",
+  "description": "Headlamp plugin for Fairwinds Polaris audit results",
+  "scripts": {
+    "start": "headlamp-plugin start",
+    "build": "headlamp-plugin build",
+    "tsc": "tsc --noEmit"
+  },
+  "devDependencies": {
+    "@kinvolk/headlamp-plugin": "^0.13.0"
+  }
+}