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.

controllers/api/authors.go

@@ -3,7 +3,6 @@ package api
 import (
 	"context"
 	"encoding/json"
-	"log/slog"
 	"net/http"
 	"strings"
 	"unicode"
@@ -128,7 +127,7 @@ func authorAvatar(ctx context.Context, db *gorm.DB, userID uint) any {
 	}
 	f, err := cabana.BackendUserAvatar(ctx, db, userID)
 	if err != nil {
-		slog.Default().WarnContext(ctx, "journal api: author avatar lookup failed", "author", userID, "error", err)
+		pluginLog.WarnContext(ctx, "journal api: author avatar lookup failed", "author", userID, "error", err)
 		return nil
 	}
 	if f == nil || !f.Public() {