Validate TSV files for processing

[sumanbalayar08]

Summary

Added data validation and enhanced error handling for input files in the school center allocation script.

Pull request type

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Please tick the type of change your PR introduces:

• [ ] Bugfix
• [x] Feature
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no API changes)
• [ ] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

What is the current behaviour?

The current script does not validate the input data, which can lead to errors and incorrect allocations when invalid data is provided.

Issue Number: N/A

What is the current behaviour?

Please describe the changes or updates being made by this pull request.

• Added a validate_data function to check the integrity of input files for schools, centers, and preferences.
• Enhanced error handling for file operations to catch common issues like file not found, permission errors, and malformed data.
• The script now exits with a relevant error message if validation fails or if there are issues with reading the files.

Checklist

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• [x] I have tested the changes locally and they work as intended.
• [x] I have provided a detailed description of the changes made.
• [x] I have reviewed the formatting and ensured it follows the project's style guidelines.
• [ ] I have assigned the appropriate labels to the pull request.
• [ ] I have added necessary documentation or updated existing documentation for the changes made.
• [ ] I have addressed code review feedback and resolved any conflicts with the main branch.

Other information

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