NDC Conversion does NOT consider full extrinsic matrix

[PotatoPalooza]

The COLMAP NDC code must be fixxed to account for the camera's extrinsic rotations as right now it is centering the scene based on key points translations alone. This can be implemented by replacing the center point with an average of the real camera coordinates using Camera center C = -R^Tt where C is the camera center point, -R^T is the transposed rotation matrix from the extrinsic matrix and t is the translation component of the extrinsic matrix. Another solution may involve projecting the points3D data across all extrinsics and taking an average of that projection. This may be better at centering the object of interest within the bounding box for TensoRF.