docs(skill): document sendNotification action (7 actions total) + CLI support
- skill: SKILL.md (7 actions in description + routing table entry), action-types.md
(new section #4 sendNotification: config keys, variables, system-in-app semantics),
automation-guide.md/cli-reference.md (--to-user/--title/--message/--severity/--path),
development.md (7 actions), metadata.json abstract
- cli: action add --type sendNotification now builds config from granular flags
(toUserId/title/message/severity/path); ACTION_TYPES includes sendNotification;
live-verified via workflow create + action add + delete
yeuimu
146d62c80b