Add panoramax=* universal field (#1344)

Author: mnalis

data/fields/panoramax.json

@@ -0,0 +1,8 @@
+{
+    "key": "panoramax",
+    "type": "identifier",
+    "label": "Panoramax Image ID",
+    "urlFormat": "https://api.panoramax.xyz/#focus=pic&pic={value}",
+    "pattern": "^[a-zA-Z0-9-]{36,}$",
+    "universal": true
+}