release: promote to stable 5.0.0

- Promote beta features to stable release
- Update version from 4.38.0 to 5.0.0
- Automated promotion via GitHub Actions

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "bmad-method",
-  "version": "4.38.0",
+  "version": "5.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "bmad-method",
-      "version": "4.38.0",
+      "version": "5.0.0",
       "license": "MIT",
       "dependencies": {
         "@kayvan/markdown-tree-parser": "^1.5.0",