feat(magic): suggest OCR on image inputs (Magic)

- Add Magic checks to Optical Character Recognition to detect common image formats via magic bytes
- Provide default args (show confidence, LSTM engine) when auto-suggested

Authored-by: Izai Alejandro Zalles Merino <zallesrene@gmail.com>

src/core/operations/OpticalCharacterRecognition.mjs

@@ -46,6 +46,13 @@ class OpticalCharacterRecognition extends Operation {
                 defaultIndex: 1
             }
         ];
+        this.checks = [
+            {
+                pattern: "^(?:\xff\xd8\xff|\x89\x50\x4e\x47|\x47\x49\x46|.{8}\x57\x45\x42\x50|\x42\x4d)",
+                args: [true, "LSTM only"],
+                useful: true
+            }
+        ];
     }
 
     /**