Add export tasks

[inv-jishnu]

Description

In this PR I have added classes and dtos for export tasks which processes the data to be exported for supported export file formats (JSON, JSONLines and CSV).

Related issues and/or PRs

Please review and merge this PR once the following PRs are merged

• Add table metadata service #2434
• Add export options validator #2435
• Add ScalarDB Dao and related files  #2417

Changes made

Added producer tasks to generate export output files

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• Tests (unit, integration, etc.) have been added for the changes.
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

Road map to merge remaining data loader core files. Current status

• General

  • Add ScalarDB Dao and related files - Add ScalarDB Dao and related files  #2417
  • TableMetadataService(partially replaced by ConsensusUtils): Add table metadata service #2434

• Export

  • Export options and validations: Add export options validator #2435
  • ProducerTasks: 1 PR incoming

• Import

  • Dto classes and utilities: Add data chunk and task result enums and dtos #2442
  • Import processor and task code: 2-3 PRs incoming
    • Add dtos and other classes for task #2446
  • Code for Import transaction batch and data chunk import: 1 PR Incoming
  • ControlFile related Dtos: Add Control file module files and validation  #2445
  • Import logger: 1 PR incoming
  • Import Manager: 1 PR incoming

Release notes

NA