support AddIndex/DeleteIndex for disk table

**Describe the feature you'd like**

Add support of AddIndex/DeleteIndex for `DiskTable`

The issue mentions adding support for AddIndex/DeleteIndex for DiskTable. Look for the DiskTable class in the codebase, likely in storage or table modules. Examine existing index management for other table types to understand the interface. Determine what methods need to be implemented and how they integrate with the overall database system.

索引モデルが issue の本文から書いたものです。