Raise error if no files are found

[seanbudd]

Passing in an invalid path leads validation to unexpectedly pass.
This is because when globbing the path, no files are found, meaning validation occurs against no files.
This can be quite misleading for developers, as it is unclear why passing in what seems like a proper file path with validation errors yields no validation errors. See nvaccess/addon-datastore#6712 for context

[Copilot]

Pull Request Overview

This PR adds validation to prevent silent failures when invalid file paths are provided to the validation script. Previously, passing an invalid path would cause validation to unexpectedly pass because no files would be found to validate against.

• Added error checking to raise a ValueError when no files match the provided glob pattern
• Updated workflow test paths to use correct file locations

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
_validate/validate.py	Added validation to raise ValueError when no files are found matching the glob pattern
.github/workflows/testCode.yaml	Updated file paths in workflow commands to use correct test data locations

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