ChatGrid Backend Setup Procedure Update.

[sichenjin]

Merge request type

• New feature
• Resolves bug
• Documentation
• Other

Relates to

• OPFLOW
• SOPFLOW
• SCOPFLOW
• TCOPFLOW
• CMake build system
• Spack configuration
• Manual
• Web docs
• Other

This MR updates

• Header files
• Source code
• CMake build system
• Spack configuration
• Web docs
• Manual
• Other

Summary

I updated the backend setup procedures in the README.md in the viz folder. Specifically, there was a mistake in the script name; 'jsontocsv.py' is the correct script for generating the required data formats for database import, not 'dataprocess.py' as previously mentioned. I also included the example datasets generated by running 'python jsontocsv.py case_ACTIVSg10k.json', including generation.csv, bus.csv, and tranmission_line.csv.

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