Modernize Discord bot to v14 and Node.js 22

Major upgrades and architectural improvements:
- Upgrade Discord.js from v12 to v14.21.0
- Upgrade Node.js from 14 to 22 LTS
- Switch to pnpm package manager
- Complete rewrite with modern Discord API patterns

New Features:
- Hybrid command system: prefix commands + slash commands
- /sfx slash command with autocomplete for sound discovery
- Modern @discordjs/voice integration for audio
- Improved voice connection management
- Enhanced logging for SFX commands
- Multi-stage Docker build for optimized images

Technical Improvements:
- Modular architecture with services and command handlers
- Proper intent management for Discord gateway
- Better error handling and logging
- Hot-reload capability maintained
- Environment variable support
- Optimized Docker container with Alpine Linux

Breaking Changes:
- Moved main entry from index.js to src/index.js
- Updated configuration structure for v14 compatibility
- Replaced deprecated voice APIs with @discordjs/voice
- Updated audio dependencies (opus, ffmpeg)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/utils/helpers.js

@@ -0,0 +1,70 @@
+/**
+ * Pick a random element from an array
+ * @param {Array} arr 
+ * @returns {*} Random element from the array
+ */
+function randElement(arr) {
+  return arr[Math.floor(Math.random() * arr.length)];
+}
+
+/**
+ * Random sort function
+ * @returns {number}
+ */
+function randSort() {
+  return 0.5 - Math.random();
+}
+
+/**
+ * Split a string into chunks of specified size
+ * @param {string} str 
+ * @param {number} size 
+ * @returns {string[]}
+ */
+function chunkSubstr(str, size) {
+  const numChunks = Math.ceil(str.length / size);
+  const chunks = new Array(numChunks);
+
+  for (let i = 0, o = 0; i < numChunks; ++i, o += size) {
+    chunks[i] = str.substr(o, size);
+  }
+
+  return chunks;
+}
+
+/**
+ * Async forEach implementation
+ * @param {Array} array 
+ * @param {Function} callback 
+ */
+async function asyncForEach(array, callback) {
+  for (let index = 0; index < array.length; index++) {
+    await callback(array[index], index, array);
+  }
+}
+
+/**
+ * Converts seconds to human-readable time
+ * @param {number} seconds 
+ * @returns {string} HH:MM:SS format
+ */
+function toHHMMSS(seconds) {
+  const sec_num = parseInt(seconds, 10);
+  let hours = Math.floor(sec_num / 3600);
+  let minutes = Math.floor((sec_num - hours * 3600) / 60);
+  let secs = sec_num - hours * 3600 - minutes * 60;
+
+  if (hours < 10) hours = "0" + hours;
+  if (minutes < 10) minutes = "0" + minutes;
+  if (secs < 10) secs = "0" + secs;
+  
+  return hours + ":" + minutes + ":" + secs;
+}
+
+module.exports = {
+  randElement,
+  randSort,
+  chunkSubstr,
+  asyncForEach,
+  toHHMMSS
+};