feat: implement role, permission, project, milestone, and task command groups
- Add role commands: list, get, create, update, delete, set/add/remove-permissions
- Add permission list command
- Add project commands: list, get, create, update, delete, members, add/remove-member
- Add milestone commands: list, get, create, update, delete, progress
- Add task commands: list, get, create, update, transition, take, delete, search
- Wire all new command groups into main.go dispatcher
- All commands support --json output mode and --token manual auth
- Passes go build and go vet cleanly
zhi
57af1512d1