chore: add helper script for running everything at once

scripts/start.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -e
+cargo build \
+    --bin revolt-delta \
+    --bin revolt-bonfire \
+    --bin revolt-autumn \
+    --bin revolt-january
+
+trap 'pkill -f revolt-' SIGINT
+cargo run --bin revolt-delta &
+cargo run --bin revolt-bonfire &
+cargo run --bin revolt-autumn &
+cargo run --bin revolt-january