Add .gitattributes

.gitattributes

+# Declare files that will always have LF line endings on checkout.
+*.sh text eol=lf
+gradlew text eol=lf
+
+# Declare files that will always have CRLF line endings on checkout.
+*.{bat,[bB][aA][tT]} text eol=crlf
+*.{cmd,[cC][mM][dD]} text eol=crlf