refactor: unify milestone flow, remove deprecated commands
Consolidate /gsd:new-milestone to mirror /gsd:new-project:
- questioning → research (optional) → requirements → roadmap
BREAKING CHANGES:
- Remove /gsd:discuss-milestone (consolidated into new-milestone)
- Remove /gsd:create-roadmap (integrated into project/milestone flows)
- Remove /gsd:define-requirements (integrated into project/milestone flows)
- Remove /gsd:research-project (integrated into project/milestone flows)
Deleted files:
- commands/gsd/{discuss-milestone,create-roadmap,define-requirements,research-project}.md
- get-shit-done/workflows/{discuss-milestone,create-roadmap,define-requirements}.md
- get-shit-done/templates/milestone-context.md
Updated references in:
- progress.md, complete-milestone.md, help.md
- complete-milestone workflow, continuation-format.md
- questioning.md, requirements.md template, SUMMARY.md template
- gsd-project-researcher.md, gsd-roadmapper.md
- README.md
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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