add script to quickly start back- and frontend in dev mode

start_interactive.sh

+#!/bin/bash
+
+start_backend() {
+    DEBUG=true uvicorn evoprompt.api.main:app --reload
+}
+start_frontend() {
+    BROWSER="none" npm run start --prefix evoprompt/frontend
+}
+
+start_backend & pid_backend=($!)
+start_frontend & pid_frontend=($!)
+python -m webbrowser -t "http://localhost:8000"
+wait "$pid_backend"
+kill "$pid_frontend"