Add commandManager and the first slash command

the command allows for summining the bot without sending an actual mention message
that might hang in the chat log sent to openAi, consuming tokens

src/interactionManager.ts

@@ -0,0 +1,40 @@
+import { Interaction, Client as DiscordClient } from "discord.js";
+import requireDirectory from "require-directory";
+
+import Command from "./command";
+
+export default class CommandManager {
+  readonly commands: Command[] = [];
+
+  constructor(directory = "./commands") {
+    const files = requireDirectory(module, directory);
+    for (const i in files ) {
+      try {
+        // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+        // @ts-ignore
+        this.commands.push(new (files[i].default as Command)());
+      }
+      catch (e) {
+        console.error(`Failed to construct command ${i} (${typeof e}):`);
+        console.error(e);
+      }
+    }
+  }
+
+  onInteraction(interaction: Interaction) {
+    if (
+      interaction.isChatInputCommand() ||
+      interaction.isMessageContextMenuCommand() ||
+      interaction.isUserContextMenuCommand()
+    ) {
+      const foundCommand = this.commands.find((command) => command.name == interaction.commandName );
+      if (!foundCommand) throw new Error(`Unknown command received (${interaction.commandName}). Did you forgot to push updated commands?`);
+      foundCommand.execute(interaction);
+      return;
+    }
+  }
+
+  bindClient(client: DiscordClient) {
+    client.on("interactionCreate", (e) => this.onInteraction(e));
+  }
+}