feat: new slash commands and bug fixes (#23)

## Summary

- **feat**: Add `/remind` owner-only command — sends a meeting waiting room notification to a specified user in `#general`
- **fix**: Prevent duplicate DM notifications when a message matches both `respondToMention` and `notifyNameMention` patterns
- **feat**: Port `/alt-text` and `/query` commands from Cordelia — owner-only, AI-powered, using Amari's personality
- **feat**: Add `/research` command — owner-only, web-search-backed query returning results as a markdown file attachment
- **fix**: Suppress non-critical RetroAchievements fetch errors (job retries every 10 minutes)

Closes #19, #20, #21, #22
Also resolves #2 (unhandled HTTP rejections from RA API)

Reviewed-on: #23
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src/commands/query.ts

@@ -0,0 +1,57 @@
+/**
+ * @copyright NHCarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
+import { ids } from "../config/ids.js";
+import { logger } from "../utils/logger.js";
+import { makeAiRequest } from "../utils/makeAiRequest.js";
+import type { Amari } from "../interfaces/amari.js";
+
+const fallbackResponse = "I'm sorry, I don't have an answer for that."
+  + " Please try again later.";
+
+/**
+ * Accepts an arbitrary question and sends it to Claude to be answered.
+ * @param _amari - The Amari instance (unused but kept for handler consistency).
+ * @param interaction - The Discord slash command interaction.
+ */
+export const query = async(
+  _amari: Amari,
+  interaction: ChatInputCommandInteraction,
+): Promise<void> => {
+  if (interaction.user.id !== ids.users.naomi) {
+    await interaction.reply({
+      content: "This command is restricted to Naomi.",
+      flags:   [ MessageFlags.Ephemeral ],
+    });
+    return;
+  }
+
+  const prompt = interaction.options.getString("prompt", true);
+
+  await interaction.deferReply({ flags: [ MessageFlags.Ephemeral ] });
+
+  try {
+    const response = await makeAiRequest({
+      maxTokens:    2000,
+      systemPrompt: "Your role in this conversation is to answer the user's"
+        + " question to the best of your abilities. When possible, include"
+        + " links to relevant sources.",
+      userMessage: prompt,
+    });
+
+    await interaction.editReply({
+      content: response ?? fallbackResponse,
+    });
+  } catch (error) {
+    await logger.error("query command", error instanceof Error
+      ? error
+      : new Error(String(error)));
+    await interaction.editReply({
+      content: "Something went wrong whilst processing your question.",
+    });
+  }
+};