docs: Complete documentation overhaul with live API data + bug fixes

Documentation (5800+ lines total):
- endpoints.md: All 43 endpoints documented with real response examples,
  param tables, response patterns, common workflows, error formats
- streaming.md: Complete streaming workflow guide with HLS.js/Plyr/Video.js
  integration, M3U8 proxy explanation, error handling
- examples.md: Working code examples in cURL, JS fetch, Python requests,
  Node.js axios, HTML/JS player integration (2240 lines)
- architecture.md: Full project structure, request flow diagrams, caching
  strategy, mirror failover, security, deployment notes
- index.md: Overview with quick start, feature highlights, endpoint tables

Bug fixes:
- episodeList.extractor: Parse JSON response before Cheerio (was passing
  raw JSON string as HTML, causing escaped quotes in IDs)
- episodeListAjax.extractor: Same JSON parsing fix
- topAnimeRankings.controller: Fix JSDoc and default sort from top to day
  (actual values are day/week/month, not top/newest)
- apiRoutes.js: Fix OpenAPI spec sort description for top-rankings

Tests: 35/35 passing

src/extractors/episodeList.extractor.js

@@ -61,7 +61,8 @@ const extractEpisodeList = async (slugOrId) => {
         headers: { "X-Requested-With": "XMLHttpRequest" }
       });
 
-      const ajaxHtml = typeof ajaxRaw === "string" ? ajaxRaw : (ajaxRaw?.result || "");
+      const ajaxParsed = typeof ajaxRaw === "string" ? JSON.parse(ajaxRaw) : ajaxRaw;
+      const ajaxHtml = ajaxParsed?.result || "";
       const $ep = cheerio.load(ajaxHtml);
 
       const episodes = [];

src/extractors/episodeListAjax.extractor.js

@@ -55,7 +55,8 @@ const extractEpisodeListAjax = async (animeId, style = "", vrf = "") => {
     });
 
     // NOTE: Response is JSON {status, result} where result is HTML
-    const html = typeof raw === "string" ? raw : (raw?.result || "");
+    const parsed = typeof raw === "string" ? JSON.parse(raw) : raw;
+    const html = parsed?.result || "";
     const $ = cheerio.load(html);
 
     // NOTE: Extract filter options (Sub/Dub, episode ranges)