v2.1.1

• Replaced references to 'spec-researcher' (depreciated agent name) with 'spec-shaper'.
• Clarified --dry-run output to user to reassure we're in dry-run mode
• Tightened up template and istructions for writing spec.md, aiming to keep it shorter, easier to scan, and covering only the essentials.
• Tweaked create-task-list workflow for consistency.
• When planning product roadmap, removed instruction to limit it to 12 items.