Create .gitattributes

[samgdotson]

Summary of changes

Adds a .gitattributes file to remove matlab and jupyter notebooks from the language card for saltproc. It is not a matlab code, to my knowledge and jupyter is overrepresented due to the size of its metadata.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Required for Merging

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• My change is a source code change
  • I have added/modified tests to cover my changes
  • I have explained why my change does not require new/modified tests
• My change is a user-facing change
  • I have recorded my changes in the changelog for the upcoming release
• My change is exclusively related to the repository (e.g. GitHub actions workflows, PR/issue templates, etc.)
  • I have verified or justified that my change will work as intended.
• All new and existing tests passed.
  • CI tests pass
  • Local tests pass (including Serpent2 integration tests)

Associated Issues and PRs

• Issue: #

Associated Developers

• Dev: @yardasol

Checklist for Reviewers

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Review Checklist before they begin their review.

[yardasol]

Great addition!