Function eval_mesh

Compute Mesh metrics between prediction and target. Opens the Meshs and runs the metrics Args: file_pred: file path of prediction (should be mesh) file_trgt: file path of target (shoud be point cloud) down_sample_res: use voxel_downsample to uniformly sample mesh poi

(file_pred, file_trgt, down_sample_res=0.02, threshold=0.05, truncation_acc=0.50, truncation_com=0.50, gt_bbx_mask_on= True, 
              mesh_sample_point=10000000, possion_sample_init_factor=5)