Initial commit: Beta testnet configuration

- Chainspec file (5.2MB) with genesis hash 0xa017...54b1
- Validator startup scripts for Computer 2 (validators 5-8)
- Complete setup instructions in README
- Configuration for 8-validator beta testnet

scripts/stop-validators-computer2.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+# Stop all validators on Computer 2
+
+YELLOW='\033[1;33m'
+GREEN='\033[0;32m'
+NC='\033[0m'
+
+echo -e "${YELLOW}🛑 Stopping Computer 2 Validators...${NC}"
+
+for i in 5 6 7 8; do
+    if [ -f "/tmp/beta-validator-$i.pid" ]; then
+        PID=$(cat /tmp/beta-validator-$i.pid)
+        echo -e "${GREEN}Stopping Validator $i (PID: $PID)...${NC}"
+        kill $PID 2>/dev/null || true
+        rm /tmp/beta-validator-$i.pid
+    fi
+done
+
+echo -e "${GREEN}✅ All validators stopped${NC}"