feat: Add event listener to respond to messages mentioning the bot

- Implemented an event listener in `index.js` to reply to messages where the bot is mentioned.
- The bot now responds with a greeting and a brief description of its capabilities.
- remived fallback versions of streamyfin in `createissue`

client.js

@@ -46,9 +46,7 @@ module.exports = class Streamyfin extends Client {
     } catch (error) {
       console.error("Error fetching releases:", error);
       return [
-        { name: "0.22.0", value: "0.22.0" }, // Fallback data
-        { name: "0.21.0", value: "0.21.0" },
-        { name: "Older", value: "Older" },
+      { name: "unknown", value: "unknown" }, // Fallback data
       ];
     }
   };

index.js

@@ -40,6 +40,12 @@ client.on("interactionCreate", async (interaction) => {
 		});
 	}
 })
+
+client.on('messageCreate', message => {
+  if (message.mentions.has(client.user) && !message.author.bot) {
+    message.reply("Hi there, I'm Finn! I'm a bot written for streamyfin! To find out what I can do, use `/help`!");
+  }
+});
 const registerCommands = async () => {
   if (client.githubToken) await client.fetchReleases();