feat: add network property to delegation portal (#1051)

* feat: add network property to delegation portal

* fix: make network property optional for backward compatibility

---------

Co-authored-by: Less <[email protected]>

Author: wa0x6e

src/schemas/space.json

@@ -269,6 +269,14 @@
               "description": "The address of your delegation contract",
               "examples": ["0x3901D0fDe202aF1427216b79f5243f8A022d68cf"]
             },
+            "delegationNetwork": {
+              "type": "string",
+              "snapshotNetwork": true,
+              "title": "Delegation network",
+              "minLength": 1,
+              "maxLength": 32,
+              "description": "The network of your delegation contract"
+            },
             "delegationApi": {
               "type": "string",
               "format": "uri",