v1.5.0: Complete documentation rewrite - 50+ files with AlisaReactionBot style

- Box-style header comments (Project, Author, License) on every file
- Section headers using double-line box decorators
- Feature markers (// ---- FEATURE: XYZ ----) before every major function
- JSDoc comments for EVERY function with @param, @returns, @example
- Inline notes (NOTE, WARNING, TIP) for non-obvious logic
- Footer END markers on every module
- Matched code style to AlisaReactionBot repository
- All files now searchable by feature name via grep

Author: Shinei Nouzen <157171073+Shineii86@users.noreply.github.com>

src/controllers/azList.controller.js

@@ -1,17 +1,55 @@
+/*
+ * ======= • ======= • ======= • ======= • =======• =======
+ * AniKatoAPI — azList.controller.js
+ * Repository: https://github.com/Shineii86/AniKatoAPI
+ *
+ * @description
+ *   Controller for alphabetical anime listing. Returns anime
+ *   filtered by starting letter with pagination support.
+ *   Default letter is 'all' if not specified.
+ *
+ * @exports
+ *   getAzList - Express route handler for GET /api/az-list/:letter
+ *
+ * @author  Shinei Nouzen
+ * @license MIT
+ * ======= • ======= • ======= • ======= • =======• =======
+ */
+
 import { extractAzList } from "../extractors/azList.extractor.js";
 import { getCache, setCache } from "../helper/cache.helper.js";
 
+// ══════════════════════════════════════════════════════════════
+// CONTROLLER: A-Z LIST
+// ══════════════════════════════════════════════════════════════
+
+// ---- FEATURE: Alphabetical anime listing endpoint ----
+/**
+ * Handles GET /api/az-list/:letter requests. Returns paginated
+ * anime list filtered by the starting letter.
+ *
+ * @param {object} req - Express request object
+ * @param {string} req.params.letter - Starting letter (default: "all")
+ * @param {number} req.query.page - Page number (default: 1)
+ * @param {object} res - Express response object
+ * @param {Function} next - Express next middleware function
+ * @returns {void} Sends JSON response with alphabetical anime list
+ *
+ * @example
+ *   GET /api/az-list/A?page=2
+ *   Response: { success: true, results: { anime, pagination, ... } }
+ *
+ * NOTE: Use 'all' as letter to get all anime without letter filtering
+ */
 const getAzList = async (req, res, next) => {
   try {
     const { letter = "all" } = req.params;
     const { page = 1 } = req.query;
-
     const cacheKey = `azlist_${letter}_${page}`;
     const cached = getCache(cacheKey);
     if (cached) {
       return res.json({ success: true, results: cached });
     }
-
     const data = await extractAzList(letter, page);
     setCache(cacheKey, data);
     res.json({ success: true, results: data });
@@ -20,4 +58,6 @@ const getAzList = async (req, res, next) => {
   }
 };
 
-export { getAzList };
+export { getAzList };
+
+// ══════════════════════════════════════════════════════════════ END: azList.controller.js