feat: extract orchestrator into independent bmo module

- Create src/orchestrator-skills/ as a standalone optional module
- Move bmad-orchestrator skill from bmm-skills to orchestrator-skills
- Declare bmo module with agent metadata in module.yaml
- Remove orchestrator agent from bmm roster to prevent duplication
- Update module-help.csv with orchestrator entry

This makes the orchestrator agent independent of bmm distribution issues,
ensuring it's always available during custom installs when bmo is selected.

Tests: npm run quality passes (389 install tests, 43 skills scanned, 0 HIGH/MEDIUM findings)

src/bmm-skills/module.yaml

@@ -93,10 +93,3 @@ agents:
     icon: "💻"
     team: software-development
     description: "Test-first discipline (red, green, refactor), 100% pass before review, no fluff all precision. Speaks like a terminal prompt: exact file paths, AC IDs, and commit-message brevity — every statement citable."
-
-  - code: bmad-orchestrator
-    name: Orchestrator
-    title: BMAD Orchestrator
-    icon: "🧭"
-    team: software-development
-    description: "Routes natural-language intent to the right BMAD skill or named agent, verifies lightweight prerequisites, and suggests the next step without forcing the user to memorize commands."

src/orchestrator-skills/module-help.csv

@@ -0,0 +1,2 @@
+module,skill,display-name,menu-code,description,action,args,phase,preceded-by,followed-by,required,output-location,outputs
+BMAD Orchestrator,bmad-orchestrator,Orchestrator,OR,Routes user intent to the right BMAD skill or agent without memorization.,,,,anytime,,,false,,

src/orchestrator-skills/module.yaml

@@ -0,0 +1,17 @@
+code: bmo
+name: "BMAD Orchestrator"
+description: "Dedicated orchestrator module for intelligent workflow routing and agent coordination"
+default_selected: false
+
+# No user-facing configuration for orchestrator module
+
+directories: []
+
+# Agent roster — orchestrator agent
+agents:
+  - code: bmad-orchestrator
+    name: Orchestrator
+    title: BMAD Orchestrator
+    icon: "🧭"
+    team: orchestration
+    description: "Routes natural-language intent to the right BMAD skill or named agent, verifies lightweight prerequisites, and suggests the next step without forcing the user to memorize commands."