[SkowronskiAndrew]

Summary

Fixes #146.

Unity data files under TestCommon/Data were only partly covered by the binary rules in .gitattributes.
Anything else fell through to * text=auto eol=lf, where git decides by looking for a NUL byte in the first
8000 bytes. Some files, such as sharedassets0.assets.resS, were classified as text. Nothing is corrupt
today, but a future fixture containing 0d 0a would have it rewritten on checkout.

Changes

• TestCommon/Data/** -text turns off EOL conversion for the whole test data folder. A path rule is used
  rather than per-extension binary rules because many fixtures have no extension (bundle names like
  alienprefab, a, 6, CAB-*).
• TestCommon/Data/**/*.md text keeps the README/AGENTS/CLAUDE files normalized.
• -text (not binary) is used so the JSON, manifest and txt fixtures still show text diffs.

Testing

• git add --renormalize . produced no content changes to any committed file.
• git check-attr confirms .resS is now text: unset and the READMEs are text: set.
• dotnet test: full suite green.

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