remove v3 docs, clarify contribution guidlines, fix teams to use proper bmad agent.

bmad-core/agent-teams/team-all.yml

@@ -3,7 +3,7 @@ bundle:
   description: This is a full organization of agents and includes every possible agent. This will produce the larges bundle but give the most options for discussion in a single session
 
 agents:
-  - bmad
+  - bmad-orchestrator
   - "*"
 
 workflows:

bmad-core/agent-teams/team-fullstack.yml

@@ -9,7 +9,7 @@ bundle:
     refactoring, and system modernization.
 
 agents:
-  - bmad
+  - bmad-orchestrator
   - analyst
   - pm
   - ux-expert

bmad-core/agent-teams/team-no-ui.yml

@@ -3,7 +3,7 @@ bundle:
   description: This is a team that is responsible for planning the project without any UI/UX design. This is for projects that do not require UI/UX design.
 
 agents:
-  - bmad
+  - bmad-orchestrator
   - analyst
   - pm
   - architect