added temporary changeset to feature branch for $modes support

Author: didoo

.changeset/tough-cows-rule.md

@@ -0,0 +1,8 @@
+---
+"@hashicorp/design-system-tokens": major
+---
+
+MODES - TODOs
+
+- Decide if this is a `major` or a `minor`
+- Add a proper changeset entry here