Implement import/export in new version

[FelixCAAuer]

No description provided.

[Copilot]

Pull Request Overview

This pull request adds support for a new Power_ImportExport table that replaces the previous Power_ImpExpHubs and Power_ImpExpProfiles tables, consolidating import/export data into a single file. It introduces a "grouped columns" feature to the Excel reader/writer framework to handle multiple hub-node pairs with repeating column structures.

• Introduces Power_ImportExport table to replace Power_ImpExpHubs and Power_ImpExpProfiles
• Implements "grouped columns" feature for handling repeating column patterns in Excel files
• Updates case study loading and scaling logic to use the new consolidated table

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/test_ExcelReaderWriter.py	Adds test case for Power_ImportExport read/write functionality
data/example/Power_ImportExport.xlsx	Adds example Excel file for the new Power_ImportExport table
TableDefinitions.xml	Defines Power_ImportExport table structure with grouped columns
TableDefinition.py	Adds grouped column support to Column class
ExcelWriter.py	Implements grouped column writing logic and adds write_Power_ImportExport method
ExcelReader.py	Implements get_Power_ImportExport method to read the new table format
CaseStudy.py	Updates case study to use Power_ImportExport instead of the two separate tables

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