Move CaptureParams into camera from autofocus

src/openflexure_microscope_server/things/camera/__init__.py

@@ -20,6 +20,7 @@ from typing import Any, Literal, Mapping, Optional, Self, Tuple
 import numpy as np
 import piexif
 from PIL import Image
+from pydantic import BaseModel
 
 import labthings_fastapi as lt
 from labthings_fastapi.types.numpy import NDArray
@@ -47,6 +48,13 @@ class CaptureError(RuntimeError):
     """An error trying to capture from a CameraThing."""
 
 
+class CaptureParams(BaseModel):
+    """A class for capturing at least a single image."""
+
+    images_dir: str
+    save_resolution: tuple[int, int]
+
+
 class NoImageInMemoryError(RuntimeError):
     """An error called if no image is in memory when accessed."""