feat: implement camera management with GPhotoCamera and CameraManager classes

core/camera/gphoto_camera.py

@@ -0,0 +1,46 @@
+import gphoto2 as gp
+import cv2
+import numpy as np
+
+from .base_camera import BaseCamera
+
+class GPhotoCamera(BaseCamera):
+    def __init__(self) -> None:
+        super().__init__()
+        self.camera = None
+
+    def connect(self) -> bool:
+        self.error_msg = None
+        try:
+            self.camera = gp.Camera()   # type: ignore
+            self.camera.init()
+            return True
+        except Exception as e:
+            self.error_msg = f"[GPHOTO2] {e}"
+            self.camera = None
+            return False
+
+
+    def disconnect(self) -> None:
+        if self.camera:
+            self.camera.exit()
+            self.camera = None
+
+    def get_frame(self):
+        self.error_msg = None
+
+        if self.camera is None:
+            self.error_msg = "[GPHOTO2] Camera is not initialized."
+            return (False, None)
+        
+        try:
+            file = self.camera.capture_preview()    # type: ignore
+            data = file.get_data_and_size()
+            frame = np.frombuffer(data, dtype=np.uint8)
+            frame = cv2.imdecode(frame, cv2.IMREAD_COLOR)
+            
+            return (True, frame)
+        except Exception as e:
+            self.error_msg = f"[GPHOTO2] {e}"
+            return (False, None)
+