fix(icons): apply fill to AddCircleIcon path, drop full-canvas rect

AddCircleIcon's SVG put fill={fill} (currentColor by default) on a
full-canvas 48x48 rect and left the actual icon path unfilled, so the
icon rendered as a solid rectangle of text color with a black
plus-in-circle on top — instead of a clean outlined-plus-in-circle
glyph.

Drop the background rect and apply fill={fill} to the icon path, so
AddCircleIcon renders like the @mui/icons-material/AddCircleOutline
it's intended to replace in consumers (e.g. meshery/ui).

Signed-off-by: Lee Calcote <lee.calcote@layer5.io>

Author: leecalcote

src/icons/AddCircle/AddCircleIcon.tsx

@@ -15,8 +15,10 @@ export const AddIconCircleBordered = ({
       xmlns="http://www.w3.org/2000/svg"
       {...props}
     >
-      <path d="M0 0h48v48h-48z" fill={fill} />
-      <path d="M26 14h-4v8h-8v4h8v8h4v-8h8v-4h-8v-8zm-2-10c-11.05 0-20 8.95-20 20s8.95 20 20 20 20-8.95 20-20-8.95-20-20-20zm0 36c-8.82 0-16-7.18-16-16s7.18-16 16-16 16 7.18 16 16-7.18 16-16 16z" />
+      <path
+        d="M26 14h-4v8h-8v4h8v8h4v-8h8v-4h-8v-8zm-2-10c-11.05 0-20 8.95-20 20s8.95 20 20 20 20-8.95 20-20-8.95-20-20-20zm0 36c-8.82 0-16-7.18-16-16s7.18-16 16-16 16 7.18 16 16-7.18 16-16 16z"
+        fill={fill}
+      />
     </svg>
   );
 };