A new widget type shipping without an entry there fails silently --
no error, no test failure, it just saves/applies with an empty config
forever. Caught for real on the weather widget (37d57a1); adding the
step and a matching test-pattern bullet so the next widget type doesn't
repeat it.
Nested .claude/skills/ dirs (previously under server/) are only
auto-discovered on-demand once a file under that subdirectory is
touched, so /make-widget and /run-server weren't invocable from a
fresh session. Root .claude/skills/ is scanned at session start.
Fixes setup.sh/start-server.sh's relative cd-depth math (was hardcoded
for the old server/.claude/skills/run-server/ depth) to instead
resolve the repo root via git and cd into server/ explicitly, and
updates SKILL.md/driver.py's path references to match the new layout.