Phase 3c implementation - Notification System:
### New kugetsu commands:
- `kugetsu notify list` - Show unread notifications from PM Agent
- `kugetsu notify clear` - Mark notifications as read
### Notification system:
- PM Agent writes task events to ~/.kugetsu/notifications.json
- Events: task_complete, task_blocked, task_assigned
- Supports issue_ref and gitea_url for linking
- Hermes/Chat Agent reads notifications on user messages
### kugetsu-pm v2.0:
- Updated documentation with notification behavior
- PM Agent monitors Gitea for task completion
- Two review modes: PM reviews immediately OR asks dev if ready
- Notification triggers documented
### File renamed:
- phase3a-setup.md → kugetsu-chat-setup.md (more descriptive)
### Hermes gateway analysis:
- Gateway is a client (connects to Telegram), not a server
- Cannot push messages directly to Telegram from external process
- Notifications stored locally for Hermes to pick up on next user message
3d00ddbc1b