feat & improvements & refactor: new structure, better garbage collection, better docs, better performance, added tests

src/errors.ts

@@ -0,0 +1,19 @@
+export class AudioManagerError extends Error {
+    public constructor(message: string) {
+        super(message);
+        this.name = new.target.name;
+    }
+}
+
+export class AudioManagerConfigError extends AudioManagerError {}
+
+export class AudioManagerStateError extends AudioManagerError {}
+
+export class FfmpegProcessError extends AudioManagerError {
+    public constructor(
+        message: string,
+        public readonly cause?: unknown,
+    ) {
+        super(message);
+    }
+}