feat: migrate to new plugin api

Co-authored-by: Su-Yong <simssy2205@gmail.com>

src/plugins/crossfade/index.ts

@@ -0,0 +1,50 @@
+import { createPluginBuilder } from '../utils/builder';
+
+export type CrossfadePluginConfig = {
+  enabled: boolean;
+  fadeInDuration: number;
+  fadeOutDuration: number;
+  secondsBeforeEnd: number;
+  fadeScaling: 'linear' | 'logarithmic' | number;
+}
+
+const builder = createPluginBuilder('crossfade', {
+  name: 'Crossfade [beta]',
+  restartNeeded: true,
+  config: {
+    enabled: false,
+    /**
+     * The duration of the fade in and fade out in milliseconds.
+     *
+     * @default 1500ms
+     */
+    fadeInDuration: 1500,
+    /**
+     * The duration of the fade in and fade out in milliseconds.
+     *
+     * @default 5000ms
+     */
+    fadeOutDuration: 5000,
+    /**
+     * The duration of the fade in and fade out in seconds.
+     *
+     * @default 10s
+     */
+    secondsBeforeEnd: 10,
+    /**
+     * The scaling algorithm to use for the fade.
+     * (or a positive number in dB)
+     *
+     * @default 'linear'
+     */
+    fadeScaling: 'linear',
+  } as CrossfadePluginConfig,
+});
+
+export default builder;
+
+declare global {
+  interface PluginBuilderList {
+    [builder.id]: typeof builder;
+  }
+}