Surface the new bmad-customize skill across the three customization
docs so users know they don't need to hand-author TOML to benefit
from the surface:
- customize-bmad.md: prominent tip at the top introducing the skill
as the guided authoring helper; updated the "Need to see what's
customizable?" troubleshooting tip to recommend the skill first
- expand-bmad-for-your-org.md: tip under prereqs noting every recipe
can be applied via the skill, with the recipes remaining the
reference for what to override
- named-agents.md: short paragraph in the customization section and a
link entry under the references list
Hand-authoring still works the same way; the skill is additive.
Central-config overrides are flagged as the current exception.