chore: update package version to 0.3.7

Increment version number in package.json and README.md from 0.3.5 to 0.3.7 to reflect the latest updates in the project.

Author: marklearst

README.md

@@ -2,7 +2,7 @@
 
 Public specification and governance standard for design variables. DTCG 2025.10 compliant format with naming rules, validation requirements, versioning strategy, and adapter patterns.
 
-**Version:** 0.3.5
+**Version:** 0.3.7
 **Status:** Draft
 **Editor:** Mark Learst
 

package.json

@@ -1,7 +1,7 @@
 {
   "name": "variables-contract",
   "private": true,
-  "version": "0.3.5",
+  "version": "0.3.7",
   "packageManager": "pnpm@10.26.0",
   "scripts": {
     "dev": "docmd dev",