chore: add .env.stage for deploy contracts

Author: JuArce

contracts/scripts/.env.stage

@@ -0,0 +1,10 @@
+RPC_URL=https://ethereum-holesky-rpc.publicnode.com
+PRIVATE_KEY=<YOUR_PRIVATE_KEY>
+EXISTING_DEPLOYMENT_INFO_PATH=./script/output/holesky/eigenlayer_deployment_output.json
+DEPLOY_CONFIG_PATH=./script/deploy/config/holesky/aligned.holesky.config.stage.json
+BATCHER_PAYMENT_SERVICE_CONFIG_PATH=./script/deploy/config/holesky/batcher-payment-service.holesky.config.stage.json
+OUTPUT_PATH=./script/output/holesky/alignedlayer_deployment_output.stage.json
+PROOF_AGGREGATOR_DEPLOY_CONFIG_PATH=./script/deploy/config/holesky/proof-aggregator-service.holesky.config.stage.json
+PROOF_AGGREGATOR_OUTPUT_PATH=./script/output/holesky/proof_aggregation_service_deployment_output.stage.json
+ETHERSCAN_API_KEY=<YOUR_ETHERSCAN_API_KEY>
+MULTISIG=false