Support to append file on table  #345

After we finish #275, we can support to write data and generate theDataFile. To complete #329, the next job is to support append data file and commit on transaction.

We can follow the design according to pyiceberg:

1. implement _MergingSnapshotProducer and use it to generate the UpdatesAndRequirements.
2. commit the UpdatesAndRequirements using catalog.

After this, we also can add e2e test for write. This issue also solve #225.