feat: add SuppressOutput util

This context manager suppresses/hides stdout.

invokeai/app/util/suppress_output.py

@@ -0,0 +1,24 @@
+import io
+import sys
+from typing import Any
+
+
+class SuppressOutput:
+    """Context manager to suppress stdout.
+
+    Example:
+    ```
+    with SuppressOutput():
+        print("This will not be printed")
+    ```
+    """
+
+    def __enter__(self):
+        # Save the original stdout
+        self._original_stdout = sys.stdout
+        # Redirect stdout to a dummy StringIO object
+        sys.stdout = io.StringIO()
+
+    def __exit__(self, *args: Any, **kwargs: Any):
+        # Restore stdout
+        sys.stdout = self._original_stdout