Migrate from Parquet schema to Arrow schema

[sergiimk]

Web UI is currently using JSON representation of Parquet schema when visualizing the data types. Since then we have adopted Arrow as our core data format and thus we should start using Arrow JSON schema format in Web UI too.

As part of this epic we should also:

• Add custom visualization for the op (operation type) column that is currently displayed as numeric 0, 1, 2, 3 and should be displayed as symbolic +A, -R, -C, +C.
• Better handle visualization of nested lists and struct types