chore: initial commit of ai site platform

Co-authored-by: Cursor <cursoragent@cursor.com>

platform/internal/crud/engine.go

@@ -0,0 +1,15 @@
+package crud
+
+import (
+	"context"
+
+	"aijianzhan/platform/internal/meta"
+)
+
+type Engine interface {
+	List(ctx context.Context, ref *meta.ResourceRef, tenantID int64, page, pageSize int, filters map[string]string, sortBy string) (items []map[string]any, total int, err error)
+	Get(ctx context.Context, ref *meta.ResourceRef, tenantID int64, id string) (map[string]any, error)
+	Create(ctx context.Context, ref *meta.ResourceRef, tenantID, userID int64, body map[string]any) (map[string]any, error)
+	Update(ctx context.Context, ref *meta.ResourceRef, tenantID int64, id string, body map[string]any) (map[string]any, error)
+	Delete(ctx context.Context, ref *meta.ResourceRef, tenantID int64, id string) error
+}