chore: add line ending normalization rules to .gitattributes

Author: Mag1cFall

.gitattributes

@@ -1,2 +1,6 @@
+* text=auto eol=lf
+*.bat text eol=crlf
+*.cmd text eol=crlf
+
 docs/img/*.gif filter=lfs diff=lfs merge=lfs -text
 docs/img/*.png filter=lfs diff=lfs merge=lfs -text