Bulk team invite and project sharing.

Added

invite_contributers_to_team() for bulk team invite.
add_contributors_to_project() for bulk project sharing.

Updated

upload_images_from_folder_to_project() for non existing S3 path handling.
upload_annotations_from_folder_to_project() for template name and class processing on template annotation upload.
add_annotation_comment_to_image() for unrecognized author processing.
add_annotation_point_to_image() for valid point addition on empty state.
add_annotation_bbox_to_image() for valid bbox addition on empty state.
add_annotation_comment_to_image() for valid comment addition on empty state.

Fixed

superannotatecli upload_images to accept default list of image extensions.

Removed

invite_contributor_to_team() use invite_contributors_to_team() instead