feat(api): email notification agent

no ui yet built to configure it and currently only handles MEDIA_PENDING notification types

package.json

@@ -21,6 +21,7 @@
     "bowser": "^2.11.0",
     "connect-typeorm": "^1.1.4",
     "cookie-parser": "^1.4.5",
+    "email-templates": "^8.0.0",
     "express": "^4.17.1",
     "express-openapi-validator": "^3.16.15",
     "express-session": "^1.17.1",
@@ -29,8 +30,10 @@
     "lodash": "^4.17.20",
     "next": "9.5.4",
     "node-schedule": "^1.3.2",
+    "nodemailer": "^6.4.16",
     "nookies": "^2.4.0",
     "plex-api": "^5.3.1",
+    "pug": "^3.0.0",
     "react": "16.13.1",
     "react-dom": "16.13.1",
     "react-intl": "^5.8.5",
@@ -58,11 +61,13 @@
     "@tailwindcss/typography": "^0.3.1",
     "@types/body-parser": "^1.19.0",
     "@types/cookie-parser": "^1.4.2",
+    "@types/email-templates": "^7.1.0",
     "@types/express": "^4.17.8",
     "@types/express-session": "^1.17.0",
     "@types/lodash": "^4.14.161",
     "@types/node": "^14.10.0",
     "@types/node-schedule": "^1.3.1",
+    "@types/nodemailer": "^6.4.0",
     "@types/react": "^16.9.49",
     "@types/react-dom": "^16.9.8",
     "@types/react-toast-notifications": "^2.4.0",