Camera calibration loading

[leshy]

Removed camera and stereocamera classes

we do need those, but current ones were not doing anything and were messing with my camera/ dir import
if camera and stereocamera are standardized, hardware integrations don't need to write modules, they can just write hardware integration conforming to something like

class Camera()
    cameraInfo: CameraInfo

    @abstractmethod
    def color_stream(self) -> Observable[Image]:
        pass

makes any hardware hostable in a standard camera module, will sort out in follow ups

Removed deprecated files like

SemanticSegmentationStream and stream/stereo_camera_stream

CameraInfo init from yaml

CameraInfo class now has .from_yaml method that loads a standard ros calibration file and outputs CameraInfo
perception/pointcloud/pointcloud_filtering has load_camera_matrix_from_yaml but doesn't output CameraInfo

Added a general easy way for camera integrations to provide calibrations via yaml directory

CALIBRATION_DIR = Path(__file__).parent
CameraInfo = CalibrationProvider(CALIBRATION_DIR)

auto provides

zed.CameraInfo.single_webcam or zed.CameraInfo.SingleWebcam

lazily loaded (and cached) from single_webcam.yaml calibration
adding any other yamls makes them automatically available under zed.CameraInfo.*

Fixed some legacy non-ros camera calibrator, didn't want to waste more time, can push in a follow up