Validate theme.json files against the JSON Schema

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+. "$(dirname -- "$0")/_/husky.sh"
+
+npx lint-staged

.lintstagedrc.json

@@ -0,0 +1,3 @@
+{
+	"{**/theme.json,**/styles/*.json,**/assets/fonts/*.json}": "node ./theme-utils.mjs validate-schema"
+}