llm: Add plan-implement-review pipeline command

[SaintPatrck]

Objective

Add a plan-implement-review command that orchestrates an end-to-end iOS development pipeline — requirements analysis, architecture planning, implementation, and multi-agent code review — driven by a Claude Code agent team.

Pipeline

• Plan (once): Requirements → Architecture → Work Breakdown → QA Handoff
• Implement + Review (per phase): implement → 4-reviewer gauntlet → up-to-3-round fix cycle
• Reviewer roles map to Bitwarden marketplace agents (product-analyst, tech-lead, security-engineer, code-reviewer, software-engineer); planning tasks invoke the iOS-native refining-ios-requirements and planning-ios-implementation skills.

Notes

• Requires CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1.
• Targets the implicit agent-team model (Claude Code v2.1.178+): teammates are spawned via the Agent tool and team setup/teardown is automatic — no TeamCreate/TeamDelete.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.90%. Comparing base (a5e6330) to head (9139d93).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2844      +/-   ##
==========================================
- Coverage   81.16%   78.90%   -2.26%     
==========================================
  Files        1026     1149     +123     
  Lines       65879    73178    +7299     
==========================================
+ Hits        53471    57742    +4271     
- Misses      12408    15436    +3028     

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