chore(version-scanner): split file path in output and format reporting columns

[chalmerlowe]

This pull request polishes the output format of the version_scanner. It splits the scanned file's path into directory and filename columns, and places the dependency and target version columns upfront to help reviewers quickly scan the findings.

Key changes:

• Adds file_name, dependency, and version columns to the report formats.
• Re-orders output columns in CSV and Google Sheets uploads.
• Updates unit tests to verify the new column ordering.

[gemini-code-assist]

Code Review

This pull request enhances the version scanner by adding "file_name", "dependency", and "version" fields to the CSV and spreadsheet reports, updating the corresponding unit tests, and cleaning up unused imports. The feedback recommends updating the type hints of "format_for_raw_csv" to use "Dict[str, Any]" instead of "Dict[str, str]" to avoid static analysis errors caused by non-string values like integers.