feat(gsd-tools): add compound init commands and update workflows (#468)

* feat(gsd-tools): add compound init commands for workflow setup

Adds 8 compound commands that return all context a workflow needs in
one JSON blob, replacing 5-10 atomic calls per workflow:

- init execute-phase: models, config, phase info, plan inventory
- init plan-phase: models, workflow flags, existing artifacts
- init new-project: models, brownfield detection, state checks
- init new-milestone: models, milestone info
- init quick: models, next task number, timestamps
- init resume: file existence, interrupted agent
- init verify-work: models, phase info
- init phase-op: generic phase context

Updated 8 workflows to use compound commands:
- execute-phase, plan-phase, new-project, quick
- resume-project, verify-work, discuss-phase

Token savings: ~200 lines of bash setup replaced with single init calls.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* feat(gsd-tools): add 4 new init commands and update files to use compound commands

Add new compound init commands:
- init todos - context for todo workflows
- init milestone-op - context for milestone operations
- init map-codebase - context for codebase mapping
- init progress - context for progress workflow

Update 24 files to use compound init commands instead of atomic calls:
- 4 phase operation workflows (add-phase, insert-phase, remove-phase, verify-phase)
- 5 todo/milestone workflows (add-todo, check-todos, audit-milestone, complete-milestone, new-milestone)
- 6 misc workflows (execute-plan, map-codebase, pause-work, progress, set-profile, settings)
- 6 agent files (gsd-executor, gsd-planner, gsd-phase-researcher, gsd-plan-checker, gsd-debugger, gsd-research-synthesizer)
- 2 command files (debug, research-phase)
- 1 reference file (planning-config)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix(gsd-tools): add init to help output

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix(verify-phase): correct expected init fields

The workflow was referencing plans/summaries from init phase-op,
but those fields come from ls command. Updated to reference
has_plans and plan_count which are actually in phase-op output.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

get-shit-done/workflows/map-codebase.md

@@ -22,18 +22,22 @@ Documents are reference material for Claude when planning/executing. Always incl
 
 <process>
 
-<step name="resolve_model_profile" priority="first">
+<step name="init_context" priority="first">
+Load codebase mapping context:
+
 ```bash
-MAPPER_MODEL=$(node ~/.claude/get-shit-done/bin/gsd-tools.js resolve-model gsd-codebase-mapper --raw)
+INIT=$(node ~/.claude/get-shit-done/bin/gsd-tools.js init map-codebase)
 ```
+
+Extract from init JSON: `mapper_model`, `commit_docs`, `codebase_dir`, `existing_maps`, `has_maps`, `codebase_dir_exists`.
 </step>
 
 <step name="check_existing">
-Check if .planning/codebase/ already exists:
+Check if .planning/codebase/ already exists using `has_maps` from init context.
 
+If `codebase_dir_exists` is true:
 ```bash
-CODEBASE_MAP_EXISTS=$(node ~/.claude/get-shit-done/bin/gsd-tools.js verify-path-exists .planning/codebase --raw)
-[ "$CODEBASE_MAP_EXISTS" = "true" ] && ls -la .planning/codebase/
+ls -la .planning/codebase/
 ```
 
 **If exists:**