code: @Deprecated
      public Blade post(@NonNull String path, @NonNull RouteHandler0 handler) {
          this.routeMatcher.addRoute(path, handler, HttpMethod.POST);
          return this;
      }
docs: Add a post route to routes
  
  @param path    your route path
  @param handler route implement
  @return return blade instance
  @see #post(String, RouteHandler)