feat: console help, examples and named loggers (SummerCMS v0.4.0)

Every command gets long help and examples, descriptions in imperative
sentence case, and a warn-only TestCommandsDocumented over bonfire.CheckDocs.
The plugin logs through a diary component logger instead of the process
default logger. Requires SummerCMS v0.4.0; command names and flags unchanged.

user:token:create and user:token:list gain --json, user:backfill-handles a
progress bar; planning IDs leave the descriptions.

controllers/registration.go

@@ -3,7 +3,6 @@ package controllers
 import (
 	"context"
 	"errors"
-	"log/slog"
 	"maps"
 	"net/http"
 	"time"
@@ -118,7 +117,7 @@ func FinishLogin(ctx context.Context, app *backpack.App, db *gorm.DB, user *mode
 		user.LastIPAddress = &addr
 	}
 	if err := classes.TouchLastSeen(ctx, db, user.ID); err != nil {
-		slog.Default().Warn("golem15.user: stamp last_seen on login", "user_id", user.ID, "err", err)
+		pluginLog.Warn("golem15.user: stamp last_seen on login", "user_id", user.ID, "err", err)
 	}
 	return nil
 }