fix: force LF line endings for cross-platform prettier consistency

Git on Windows auto-converts line endings to CRLF, causing prettier to
report formatting issues. Force LF for all text files.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ochafik

.gitattributes

@@ -1 +1,4 @@
+# Force LF line endings for all text files (for consistent prettier formatting)
+* text=auto eol=lf
+
 package-lock.json linguist-generated=true