Missing isTestnet and .json file extensions (#1333)

* add missing `isTestnet` flag on forma testnet

* add missing .json file extensions

* remove chain

* add native chains

* resize

---------

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

Author: piatoss3612

cosmos/source-testnet

@@ -28,5 +28,6 @@
       "coinImageUrl": "https://raw.githubusercontent.com/chainapsis/keplr-chain-registry/main/images/eip155:984123/utia.png"
     }
   ],
-  "features": []
+  "features": [],
+  "isTestnet": true
 }

evm/eip155:57073 renamed to evm/eip155:57073.json

@@ -65,6 +65,8 @@ export const nativeMainnetChainIdentifiers: string[] = [
   "eip155:43114",
   "eip155:81457",
   "eip155:80094",
+  "eip155:57073",
+  "eip155:59144",
 ];
 
 export const nativeTestnetChainIdentifiers: string[] = [