add statemine parachain-launch config

scripts/parachain-launch/README.md

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+# Parachain-launch
+
+
+
+# Introduction
+
+[Parachain-launch](https://github.com/open-web3-stack/parachain-launch) is a script that generates a docker compose file allowing you to launch a testnet of multiple blockchain nodes.
+
+To generate the compose file, first ensure `parachain-launch` is installed and run the following command
+
+```
+parachain-launch generate statemine.yml
+```
+
+This will produce an output directory that contains all the necessary files to run the testnet.
+
+Once the run is successful, you can spin up the infrastructure using the below command
+
+```
+docker-compose -f output/docker-compose.yml up -d
+```
+
+# Requirements
+[docker-compose](https://docs.docker.com/compose/install/) and [Parachain-launch](https://github.com/open-web3-stack/parachain-launch) 

scripts/parachain-launch/statemine.yml

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+relaychain:
+  image: parity/polkadot:v0.9.29
+  chain: rococo-local
+  runtimeGenesisConfig:
+    configuration:
+      config:
+        validation_upgrade_cooldown: 10
+        validation_upgrade_delay: 10
+  flags:
+    - --rpc-methods=unsafe
+  nodes:
+    - name: alice
+    - name: bob
+
+parachains:
+- image: docker.io/parity/polkadot-parachain:latest
+  chain:
+    base: statemine-local
+    collators:
+      - alice
+    sudo: alice
+  id: 2000
+  parachain: true
+  flags:
+    - --rpc-methods=unsafe
+    - --force-authoring
+  nodes:
+  - flags:
+    - --alice