Add Jarvis app icon — concentric orange signal rings

Dark squircle with 16 concentric rings rising from near-black at the
outer edge and center to KisaniOrange (#FF5C00) at the midpoint, with a
Gaussian screen-blend glow pass. Mimics the sonar/radar ring style of
the reference logo using the Jarvis black-and-orange palette.

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

Jarvis/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,6 +1,7 @@
 {
   "images" : [
     {
+      "filename" : "AppIcon.png",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"