feat(file): Added functionality to retrieve magic bytes from files and detect file types using magic bytes.

ts/classes.bucket.ts

@@ -232,6 +232,7 @@ export class Bucket {
     if (typeArg === 'webstream') {
       return (await duplexStream.getWebStreams()).readable;
     }
+    throw new Error('unknown typeArg');
   }
 
   /**
@@ -437,4 +438,28 @@ export class Bucket {
     const response = await this.smartbucketRef.s3Client.send(command);
     return response.Contents.length > 0;
   }
+
+  public async getMagicBytes(optionsArg: { path: string; length: number }): Promise<Buffer> {
+    try {
+      const command = new plugins.s3.GetObjectCommand({
+        Bucket: this.name,
+        Key: optionsArg.path,
+        Range: `bytes=0-${optionsArg.length - 1}`,
+      });
+      const response = await this.smartbucketRef.s3Client.send(command);
+      const chunks = [];
+      const stream = response.Body as any; // SdkStreamMixin includes readable stream
+  
+      for await (const chunk of stream) {
+        chunks.push(chunk);
+      }
+      return Buffer.concat(chunks);
+    } catch (error) {
+      console.error(
+        `Error retrieving magic bytes from object at path '${optionsArg.path}' in bucket '${this.name}':`,
+        error
+      );
+      throw error;
+    }
+  }
 }