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-quality-assurance/role-specs/analyst.md

@@ -1,7 +1,6 @@
 ---
 prefix: QAANA
 inner_loop: false
-additional_members: []
 message_types:
   success: analysis_ready
   report: quality_report

.claude/skills/team-quality-assurance/role-specs/executor.md

@@ -2,7 +2,6 @@
 prefix: QARUN
 inner_loop: true
 additional_prefixes: [QARUN-gc]
-additional_members: []
 message_types:
   success: tests_passed
   failure: tests_failed

.claude/skills/team-quality-assurance/role-specs/generator.md

@@ -2,7 +2,6 @@
 prefix: QAGEN
 inner_loop: false
 additional_prefixes: [QAGEN-fix]
-additional_members: []
 message_types:
   success: tests_generated
   revised: tests_revised

.claude/skills/team-quality-assurance/role-specs/scout.md

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

.claude/skills/team-quality-assurance/role-specs/strategist.md

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