fix: standardize variable naming from {project_root} to {project-root} (#1217)
Fixed inconsistent variable naming in workflow instruction files across
CIS, BMGD, and BMM modules. The standard variable format uses hyphens
({project-root}) not underscores ({project_root}).
Affected files:
- CIS: problem-solving, innovation-strategy, design-thinking, storytelling
- BMGD: brainstorm-game, narrative, create-story checklist
- BMM: excalidraw diagrams, create-story checklist
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Brian <bmadcode@gmail.com>