chore: generate funding.json for OP RPGF (#7051)

generate funding.json for OP RPGF

Author: philknows

funding.json

@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0x8ec88058175ef4c1c9b1f26910c4d4f2cfa733d6fcd1dbd9385476a313d9e12d"
+  }
+}