Change shell scripts to run new UI (#533)

run_ui.sh

@@ -1,2 +1,13 @@
-source "$(poetry env info --path)/bin/activate"
-streamlit run streamlit_app/visualizer/streamlit.py -- $@
+#!/bin/bash
+
+kill $(lsof -t -i :8080)
+
+cd skyvern-frontend
+
+if [ ! -f .env ]; then
+  cp .env.example .env
+  echo "[ERROR] Please add your api keys to the skyvern-frontend/.env file."
+fi
+
+npm install --silent
+npm run start