[Glacier] Add a StringView class and StrSplit method.

lib/glacier/string/str_split.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include "glacier/container/vector.h"
+#include "glacier/string/string_view.h"
+
+namespace glcr {
+
+// TODO: Add a split that uses a StringView as a delimeter.
+Vector<StringView> StrSplit(const StringView& str, char delimeter);
+
+}  // namespace glcr