chore: upgrade BMAD framework to skill-based architecture

Migrates from slash-command files (.claude/commands, .cursor/commands)
to the new skill-based architecture with workflow step files.

_bmad/_config/manifest.yaml

@@ -1,40 +1,40 @@
 installation:
-  version: 6.0.4
+  version: 6.2.0
   installDate: 2026-03-08T02:22:25.217Z
-  lastUpdated: 2026-03-10T12:05:13.298Z
+  lastUpdated: 2026-03-20T11:13:15.755Z
 modules:
   - name: core
-    version: 6.0.4
+    version: 6.2.0
     installDate: 2026-03-08T02:22:23.484Z
-    lastUpdated: 2026-03-10T12:05:12.136Z
+    lastUpdated: 2026-03-20T11:13:13.201Z
     source: built-in
     npmPackage: null
     repoUrl: null
   - name: bmm
-    version: 6.0.4
+    version: 6.2.0
     installDate: 2026-03-08T02:22:11.693Z
-    lastUpdated: 2026-03-10T12:05:12.136Z
+    lastUpdated: 2026-03-20T11:13:13.201Z
     source: built-in
     npmPackage: null
     repoUrl: null
   - name: bmb
-    version: 0.1.6
+    version: 1.1.0
     installDate: 2026-03-08T02:22:14.162Z
-    lastUpdated: 2026-03-10T12:05:12.491Z
+    lastUpdated: 2026-03-20T11:13:14.243Z
     source: external
     npmPackage: bmad-builder
     repoUrl: https://github.com/bmad-code-org/bmad-builder
   - name: cis
-    version: 0.1.8
+    version: 0.1.9
     installDate: 2026-03-08T02:22:16.243Z
-    lastUpdated: 2026-03-10T12:05:12.896Z
+    lastUpdated: 2026-03-20T11:13:15.395Z
     source: external
     npmPackage: bmad-creative-intelligence-suite
     repoUrl: https://github.com/bmad-code-org/bmad-module-creative-intelligence-suite
   - name: tea
-    version: 1.5.3
+    version: 1.7.1
     installDate: 2026-03-08T02:22:19.439Z
-    lastUpdated: 2026-03-10T12:05:13.298Z
+    lastUpdated: 2026-03-20T11:13:15.755Z
     source: external
     npmPackage: bmad-method-test-architecture-enterprise
     repoUrl: https://github.com/bmad-code-org/bmad-method-test-architecture-enterprise