Add .gitattributes for consistent LF line endings (#15)

Closes #14

Co-authored-by: unknown <that-github-user@github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

.gitattributes

@@ -0,0 +1,12 @@
+# Enforce LF line endings across all platforms
+* text=auto eol=lf
+
+# Explicitly mark text files
+*.ts text eol=lf
+*.json text eol=lf
+*.md text eol=lf
+*.yml text eol=lf
+*.yaml text eol=lf
+
+# Binary files
+*.png binary