refactor: reorganize project structure following go standards

integrations/jikan/anime.go

@@ -0,0 +1,35 @@
+package jikan
+
+import (
+	"context"
+	"fmt"
+	"time"
+)
+
+func (c *Client) GetAnimeByID(ctx context.Context, id int) (Anime, error) {
+	cacheKey := fmt.Sprintf("anime:%d", id)
+
+	var cached Anime
+	if c.getCache(ctx, cacheKey, &cached) {
+		return cached, nil
+	}
+
+	var result AnimeResponse
+	reqURL := fmt.Sprintf("%s/anime/%d/full", c.baseURL, id)
+
+	if err := c.fetchWithRetry(ctx, reqURL, &result); err != nil {
+		var stale Anime
+		if c.getStaleCache(ctx, cacheKey, &stale) {
+			return stale, nil
+		}
+		return Anime{}, err
+	}
+
+	ttl := time.Hour * 24
+	if result.Data.Status == "Finished Airing" {
+		ttl = time.Hour * 24 * 30
+	}
+
+	c.setCache(ctx, cacheKey, result.Data, ttl)
+	return result.Data, nil
+}