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

systemd/generator_test.go

@@ -5,6 +5,7 @@ import (
 	"path/filepath"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/warkanum/unitdore/config"
 )
@@ -437,3 +438,44 @@ func TestGenerate_ExecutableMissingPath(t *testing.T) {
 		t.Error("Generate() should error when executable is empty")
 	}
 }
+
+func TestGenerate_OrderAndDelay(t *testing.T) {
+	u := config.Unit{Name: "web", Runtime: "podman", Enabled: true, After: []string{"db", "cache"}, StartDelay: 1500 * time.Millisecond}
+	content, err := Generate(u, "p-", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, want := range []string{
+		"After=network.target unitdore-p-db.service unitdore-p-cache.service\n",
+		"ExecStartPre=/usr/bin/env sleep 2\n",
+		"TimeoutStartSec=92\n",
+	} {
+		if !strings.Contains(content, want) {
+			t.Errorf("missing %q in:\n%s", want, content)
+		}
+	}
+}
+
+func TestGenerate_UserUnitOrder(t *testing.T) {
+	u := config.Unit{Name: "web", Runtime: "podman", User: "hein", Enabled: true, After: []string{"db"}}
+	content, err := Generate(u, "", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(content, "After=default.target unitdore-db.service\n") {
+		t.Errorf("user unit missing ordering:\n%s", content)
+	}
+	if strings.Contains(content, "ExecStartPre") {
+		t.Errorf("no delay expected:\n%s", content)
+	}
+}
+
+func TestGenerate_NoOrderNoExtras(t *testing.T) {
+	content, err := Generate(config.Unit{Name: "a", Runtime: "podman", Enabled: true}, "", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(content, "ExecStartPre") || strings.Contains(content, "TimeoutStartSec") || !strings.Contains(content, "After=network.target\n") {
+		t.Errorf("unexpected ordering output:\n%s", content)
+	}
+}