Sidebar referenced non-existent paths (modules/bmm/, getting-started/, etc.)
while actual docs live in different locations (modules/bmm-bmad-method/,
bmad-core-concepts/, etc.). Updated sidebar to match reality so Docusaurus
can build successfully.
Also fixed broken image reference in workflows-guide.md that used an
incorrect relative path.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
cd11414a93
