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-tech-debt/role-specs/executor.md

@@ -1,6 +1,8 @@
 ---
 prefix: TDFIX
 inner_loop: true
+cli_tools:
+  - gemini --mode write
 message_types:
   success: fix_complete
   progress: fix_progress

.claude/skills/team-tech-debt/role-specs/scanner.md

@@ -1,6 +1,8 @@
 ---
 prefix: TDSCAN
 inner_loop: false
+cli_tools:
+  - gemini --mode analysis
 message_types:
   success: scan_complete
   error: error

.claude/skills/team-tech-debt/role-specs/validator.md

@@ -70,6 +70,9 @@ Execute 4-layer validation (all commands in worktree):
     run_in_background: false
   })
   ```
+- Re-run validation checks after fix attempt
+  })
+  ```
 - Re-run checks after fix attempt
 
 ## Phase 4: Compare & Report