chore: add repo meta files (LICENSE, README, CHANGELOG, gitignore)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitattributes

@@ -0,0 +1,7 @@
+* text=auto eol=lf
+*.bat text eol=crlf
+*.jar binary
+*.png binary
+*.jpg binary
+*.gif binary
+*.webp binary