Feature/81 slash command support (#192)

* Update discord.js

* Migrate to slash commands

* Clean up imports

* Update permissions

* Fix guild-specific commands not showing up

* Fix changes requested

package.json

@@ -24,9 +24,10 @@
   "homepage": "https://github.com/Vylpes/vylbot-app",
   "funding": "https://ko-fi.com/vylpes",
   "dependencies": {
+    "@discordjs/rest": "^1.1.0",
     "@types/jest": "^27.0.3",
     "@types/uuid": "^8.3.4",
-    "discord.js": "^13.6.0",
+    "discord.js": "^14.3.0",
     "dotenv": "^10.0.0",
     "emoji-regex": "^9.2.0",
     "jest": "^27.4.5",