feat(api): validate plex when settings are saved

package.json

@@ -26,6 +26,7 @@
     "lodash": "^4.17.20",
     "next": "9.5.3",
     "nookies": "^2.4.0",
+    "plex-api": "^5.3.1",
     "react": "16.13.1",
     "react-dom": "16.13.1",
     "react-intl": "^5.8.1",
@@ -37,6 +38,8 @@
     "swagger-ui-express": "^4.1.4",
     "swr": "^0.3.2",
     "typeorm": "^0.2.26",
+    "uuid": "^8.3.0",
+    "xml2js": "^0.4.23",
     "yamljs": "^0.3.0"
   },
   "devDependencies": {
@@ -54,6 +57,7 @@
     "@types/react-toast-notifications": "^2.4.0",
     "@types/react-transition-group": "^4.4.0",
     "@types/swagger-ui-express": "^4.1.2",
+    "@types/uuid": "^8.3.0",
     "@types/yamljs": "^0.2.31",
     "@typescript-eslint/eslint-plugin": "^4.0.0",
     "@typescript-eslint/parser": "^3.10.1",