[auth] add custom icon for stripchat (#6633)

## Description

Add custom SVG icon for stripchat to support branding in UI components.

mobile/apps/auth/assets/custom-icons/_data/custom-icons.json

@@ -1306,6 +1306,15 @@
       "title": "Startmail",
       "slug": "startmail"
     },
+    {
+      "title": "Stripchat",
+      "slug": "stripchat",
+      "altNames": [
+        "Strip Chat",
+        "stripchat.com",
+        "StripChat Live"
+      ]
+    },
     {
       "title": "STRATO",
       "hex": "FF8800"

mobile/apps/auth/assets/custom-icons/icons/stripchat.svg

@@ -0,0 +1 @@
+<svg viewBox="0 0 90 90" xmlns="http://www.w3.org/2000/svg"><path d="M44.86 8.486c23.44 0 42.423 15.87 42.423 35.463 0 18.47-16.877 33.633-38.366 35.318-.749.072-1.57-.61-1.57-1.406V57c0-1.032.538-1.853 1.31-2.602l15.893-17.04c1.172-1.267.26-2.275-.513-2.275H24.893c-.749 0-1.901 1.008-.47 2.506l15.892 16.78c.773.773 1.032 1.546 1.032 2.602v20.602c0 .797-.869 1.641-1.545 1.57a32.528 32.528 0 0 1-3.399-.447c-10.08-1.709-2.673 2.414-28.968 7.22 6.048-11.343 10.455-13.969 5.626-18.514A32.292 32.292 0 0 1 2.49 43.915c0-19.593 18.984-35.462 42.375-35.462v.033h-.005Z" fill="#A02831"/></svg>