feat: order/delay in service files, enable cmd, --all on unit commands

- install/uninstall/start/stop/enable take <name> or --all; *all kept as shortcuts
- add enable (enable at boot + start); startall no longer enables
- order/delay resolved by config.ResolveOrder and written into systemd,
  OpenRC and runit service files (After=/sleep), so they apply at boot
- install --all stops and disables units before removing their files
- update regenerates all installed, enabled units and removes disabled ones
- edit creates the config dir; docs and man page updated
- tests: fake Init for cmd, ResolveOrder, backend ordering output

AGENTS.md

@@ -27,8 +27,10 @@ make release-version  # Bump patch version, commit, tag, and push
 ## Architecture
 
 ```
-cmd/           # Cobra commands (edit, install, list, root, start, startall,
-               #   status, stop, stopall, syncup, uninstall, update)
+cmd/           # Cobra commands (edit, install, enable, list, root, start, status,
+               #   stop, syncup, uninstall, update; each of install/enable/start/
+               #   stop/uninstall takes <name> or --all, *all = shortcuts in
+               #   bulk.go); order.go = ordering; bulk_test.go = fake Init
 config/        # Config struct + YAML load/save (units.yaml)
 runtime/       # Docker and Podman runtime abstraction, compose labels
 sysuser/       # run commands as root/user (runuser), home/linger lookup
@@ -43,7 +45,7 @@ docs/          # generated-units.md (unit file examples), unitdore.1 (man page)
 
 ### Key packages
 
-- **`config`** — `Unit` and `Config` structs; `Load`, `Save`, `FindUnit`, `AddUnit`
+- **`config`** — `Unit` and `Config` structs; `Load`, `Save`, `FindUnit`, `AddUnit`, `ResolveOrder` (fills `Unit.After`/`StartDelay`, run by `Load`)
 - **`runtime`** — `ContainerRuntime` interface; `docker.go`, `podman.go` implementations
 - **`service`** — `Resolve(unit)` → start/stop commands, type, workdir; shared by all backends
 - **`initsys`** — `Init` interface; `New(cfg)` picks backend; cmd/ only talks to `Init`
@@ -66,8 +68,8 @@ units:
     runtime: podman        # podman | docker | script | exec
     user: ""               # empty = system unit; set for rootless user unit
     command: ""            # override ExecStart entirely
-    order: 1               # startup order, lower = earlier; same = parallel
-    delay: 0s              # delay after previous order group
+    order: 1               # startup order, lower = earlier; same = parallel; written into service files (After=/sleep)
+    delay: 0s              # wait before start, own value, ignored in first group
     enabled: true
     disabled_reason: ""    # auto-set by syncup reconciliation
     restart: false         # Restart=on-failure
@@ -109,6 +111,7 @@ Tests exist in:
 - `config/config_test.go`
 - `runtime/runtime_test.go`
 - `cmd/syncup_test.go`
+- `cmd/bulk_test.go`
 - `sysuser/sysuser_test.go`
 - `service/spec_test.go`
 - `initsys/initsys_test.go`