feat: Add verify all contracts command

Author: zguesmi

package.json

@@ -19,6 +19,7 @@
     "test:native": "npm run clean && TEST__IS_NATIVE_CHAIN=true npx hardhat test test/byContract/IexecEscrow/IexecEscrowNative.test.ts",
     "coverage": "npx hardhat coverage",
     "verify": "npx hardhat verify",
+    "verify:all": "npx hardhat run scripts/verify.ts",
     "format": "npx prettier --write '**/*.{js,ts,sol,json,yml}'",
     "uml": "npm run sol-to-uml && npm run puml-to-links && npm run storage-to-diagrams",
     "sol-to-uml": "npx zx scripts/tools/sol-to-uml.mjs",
@@ -85,4 +86,4 @@
     "mocha": "[Optional] Install Mocha Test Explorer in VSCode to see tests in VSCode UI",
     "solidity-coverage": "Fixing Hardhat's solidity-coverage: TypeError: provider.send is not a function"
   }
-}
+}