- Added `train` function to the Jina client for training
classifiers.
- Added `ClassificationTrain` struct to define training
parameters.
- Added `TrainingExample` struct to represent training data.
- Added `ClassificationTrainOutput` struct for the training
response.
- Added a new `classification_api.v` module for classifier
training functionalities.
- Added a new `classify` function to the Jina client for
classification tasks (currently commented out).