feat: Implement danmaku (bullet comments) functionality with API integration, settings, and player display.

lib/types/danmaku.ts

@@ -0,0 +1,17 @@
+export interface DanmakuComment {
+  text: string;
+  time: number; // seconds from video start
+  color?: string; // hex color, default white
+  type?: 'scroll' | 'top' | 'bottom'; // default 'scroll'
+}
+
+export interface DanmakuEpisode {
+  episodeId: string | number;
+  episodeTitle: string;
+}
+
+export interface DanmakuSearchResult {
+  animeId: string | number;
+  animeTitle: string;
+  episodes: DanmakuEpisode[];
+}