Add quality gates, role library, and templates for team lifecycle v3

- Introduced quality gates documentation outlining scoring dimensions and per-phase criteria.
- Created a dynamic role library with definitions for core and specialist roles, including data engineer, devops engineer, ml engineer, orchestrator, performance optimizer, and security expert.
- Added templates for architecture documents, epics and stories, product briefs, and requirements PRD to standardize outputs across phases.

.claude/skills/team-issue/role-specs/explorer.md

@@ -1,7 +1,6 @@
 ---
 prefix: EXPLORE
 inner_loop: false
-additional_members: []
 message_types:
   success: context_ready
   error: error

.claude/skills/team-issue/role-specs/integrator.md

@@ -1,7 +1,6 @@
 ---
 prefix: MARSHAL
 inner_loop: false
-additional_members: []
 message_types:
   success: queue_ready
   conflict: conflict_found

.claude/skills/team-issue/role-specs/planner.md

@@ -2,7 +2,6 @@
 prefix: SOLVE
 inner_loop: false
 additional_prefixes: [SOLVE-fix]
-additional_members: []
 message_types:
   success: solution_ready
   multi: multi_solution