fix: tsconfig to produce correct dist folder structure

Author: jorenbroekema

.changeset/seven-spoons-watch.md

@@ -0,0 +1,5 @@
+---
+'@tokens-studio/sd-transforms': patch
+---
+
+Fix tsconfig to exclude test files and ensure dist folder structure is correct.

tsconfig.json

@@ -16,5 +16,5 @@
     "skipLibCheck": true
   },
   "include": ["**/*.ts", "**/*.d.ts"],
-  "exclude": ["node_modules", "**/coverage/*"]
+  "exclude": ["node_modules", "**/coverage/*", "test"]
 }