feat: implement camera management with GPhotoCamera and CameraManager classes

core/camera/base_camera.py

@@ -0,0 +1,22 @@
+from abc import ABC, abstractmethod
+from PySide6.QtCore import Signal
+
+
+class BaseCamera(ABC):
+    def __init__(self) -> None:
+        self.error_msg = None
+
+    @abstractmethod
+    def connect(self) -> bool:
+        raise NotImplementedError
+
+    @abstractmethod
+    def disconnect(self) -> None:
+        raise NotImplementedError
+
+    @abstractmethod
+    def get_frame(self):
+        raise NotImplementedError
+    
+    def get_error_msg(self):
+        return str(self.error_msg)