Mark test snapshot files as linguist-generated

[roomote]

Summary

This PR adds comprehensive patterns to .gitattributes to mark all test snapshot files as linguist-generated=true, which will exclude them from GitHub's language statistics.

Changes

• Added patterns to cover common snapshot directory naming conventions:
  • /snapshots/ (Vitest/Jest standard)
  • /snapshots/ (alternative naming)
  • /.snapshots/ (hidden directories)
  • /_snapshots/ (underscore prefix)
• Added patterns for snapshot file extensions:
  • *.snap (standard extension)
  • *.snapshot (alternative extension)

Impact

• Current files affected: 27 existing snapshot files in src/core/prompts/tests/snapshots/
• Future-proof: Automatically covers new snapshot files from testing frameworks
• GitHub integration: Excludes generated test files from language statistics

Testing

• Verified patterns match all existing snapshot files
• All linting and type checks pass
• No impact on actual source code files

Resolves the Slack request to mark snapshot files as linguist-generated=true.

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Important

Marks test snapshot files as linguist-generated in .gitattributes to exclude them from GitHub language statistics.

• Behavior:
  • Marks test snapshot files as linguist-generated in .gitattributes to exclude from GitHub language statistics.
  • Patterns added for directories: __snapshots__, snapshots, .snapshots, _snapshots.
  • Patterns added for file extensions: .snap, .snapshot.
• Impact:
  • Affects 27 existing snapshot files in src/core/prompts/__tests__/__snapshots__/.
  • Future-proof for new snapshot files from testing frameworks.
• Testing:
  • Verified patterns match all existing snapshot files.
  • No impact on source code files.

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[delve-auditor]

✅ No security or compliance issues detected. Reviewed everything up to efbf7d3.

Security Overview

• 🔎 Scanned files: 1 changed file(s)

Detected Code Changes

Change Type	Relevant files
Configuration changes	► .gitattributes     Add linguist-generated attribute for snapshot files

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