Add README.md for test-scripts

Author: mboben

test-scripts/README.md

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+# Test scripts for Flare's P-Chain operations
+
+Tests are performed on **localflare** network and include:
+- C-chain to P-chain transfer (100 FLR)
+- P-chain to C-chain transfer (100 FLR)
+- Add validator (`NodeID-MFrZFVCXPv5iCn6M9K6XduxGTYp891xXZ` with weight 10.000 FLR and duration of 14 days)
+- Add delegator (To node `NodeID-7Xhw2mDxuDS44j42TCB6U5579esbSt3Lg` with weight 10.000 FLR and duration of 1 hour)
+
+Run localflare with in `avalanchego` directory:
+```bash
+./scripts/build.sh. # Build avalanchego
+./scripts/localflare.sh. # Run 5 localflare nodes
+```
+Check that the nodes are running by visiting `http://localhost:9650/ext/health` in your browser.
+
+Then, in a separate terminal, run the test scripts in this directory:
+```bash
+yarn 
+yarn run p-chain-import
+yarn run p-chain-export
+yarn run add-validator
+yarn run add-delegator
+```
+Note:
+- Nodejs version 20 in requred to run the scripts, also make sure you have the `yarn` package manager installed.
+- The scripts assume that the localflare network is running and accessible at the default ports.