Add build_start script

It's just easier to test when rebuilding is needed to have one command for build and start. It literally just calls build and start one after the other lol

package.json

@@ -4,6 +4,7 @@
     "main": "./.erb/dll/main.bundle.dev.js",
     "version": "1.5.2",
     "scripts": {
+        "build_start": "npm run build && npm run start",
         "build-rust-scripts": "ts-node ./.erb/scripts/build-rust-scripts.js",
         "build": "concurrently \"npm run build:main\" \"npm run build:renderer\"",
         "build:dll": "cross-env NODE_ENV=development webpack --config ./.erb/configs/webpack.config.renderer.dev.dll.ts",