refactor: update commands, workflows, agents for gsd-tools integration

Commands (15): audit-milestone, complete-milestone, debug, execute-phase,
help, insert-phase, new-milestone, new-project, plan-milestone-gaps,
plan-phase, progress, quick, remove-phase, research-phase, verify-work

Workflows (22): execute-plan (69% reduction), verify-phase (55%), others
Agents (14): All updated for new workflow structure

Total token savings: ~22k chars (75.6% in affected sections)

Ported from: get-shit-done-v2@d1fb2d5, 7f79a9b

agents/gsd-debugger.md

@@ -982,8 +982,7 @@ mv .planning/debug/{slug}.md .planning/debug/resolved/
 **Check planning config:**
 
 ```bash
-COMMIT_PLANNING_DOCS=$(cat .planning/config.json 2>/dev/null | grep -o '"commit_docs"[[:space:]]*:[[:space:]]*[^,}]*' | grep -o 'true\|false' || echo "true")
-git check-ignore -q .planning 2>/dev/null && COMMIT_PLANNING_DOCS=false
+COMMIT_PLANNING_DOCS=$(node ~/.claude/get-shit-done/bin/gsd-tools.js state load --raw | grep '^commit_docs=' | cut -d= -f2)
 ```
 
 **Commit the fix:**