WIP 0.13.0

Major changes

• Add datapipe.metastore.TransformMetaTable. Now each transform gets it's own meta table that tracks status of each transformation
• Generalize BatchTransform and DatatableBatchTransform through BaseBatchTransformStep
• Add transform_keys to *BatchTransform
• Move changed idx computation out of DataStore to BaseBatchTransformStep
• Add column priority to transform meta table, sort work by priority

New features

• Add step reset-metadata CLI command
• Add step fill-metadata CLI command that populates transform meta-table with all indices to process
• Add helm chart for running regular loops in k8s as CronJob
• Switch from vanilla tqdm to tqdm_loggable for better display in logs

• Add step run-idx CLI command

• Executors: datapipe.executor.SingleThreadExecutor, datapipe.executor.ray.RayExecutor

Bugfixes

• Fix QdrantStore.read_rows when no idx is specified