DVC Studio 'Run new experiment' fields

It would be nice to have support for multiline text field for experiment configuration.
For example if I need to pass several elements to config in a list, I must write them in one tiny line which is not very convenient.
Here's an example:
```yaml
callbacks:
- callback: 'TensorBoard'
args:
log_dir: '../logs'
- callback: 'ModelCheckpoint'
args:
filepath: 'data/checkpoints/ckpt_{epoch:03d}'
save_best_only: True
monitor: 'val_output_1_map'
```
which get transformed in something like this