fix: complete Pezkuwi overlay + proper Nova merge

Pezkuwi overlay (B source):
- pezkuwi-chains.json: 4 chains (Relay, Zagros, Asset Hub, People)
- pezkuwi-xcm.json: full XCM config with networkDeliveryFee, networkBaseWeight
- pezkuwi-xcm-dynamic.json: dynamic XCM config

Merge script:
- Takes Nova as base (A source)
- Adds Pezkuwi entries to ALL XCM sections
- Pezkuwi chains appear first
- Nothing gets deleted

All chains have disabledCheckMetadataHash: true

xcm/v8/transfers_dynamic_dev.json

@@ -242,6 +242,8 @@
       "multiLocation": {}
     }
   },
+  "networkDeliveryFee": {},
+  "networkBaseWeight": {},
   "chains": [
     {
       "chainId": "bb4a61ab0c4b8c12f5eab71d0c86c482e03a275ecdafee678dea712474d33d75",