Adding a static resize function inside the storage trait if storage is dynamic

[amitsingh19975]

Right now, we assume that if the storage has a storage_resizable_container_tag tag, then the storage has an implicit resize function. This assumption is not checked using concept that could be dangerous. I would like to propose that if the container is dynamic, there should be a static resize function that the user can define themselves, and we don't need to worry about if the container has a different way to resize function.

template <class V, class A>
struct container_traits<my_container<V,A>>
{
   using container_type  = my_container<V,A>;
  ...
  void resize(container_type& c, size_type s, value_type v) { c.grow_or_shrink(s,v); }
  ...
};

template<typename S>
concept Resizable = requires(S s){
 
  { S::resize(*static_cast<typename S::container_type*>(nullptr), size_t{}, std::declval<typename S::value_type>()) } -> std::same_as<void>;
};

template<typename V, typename E, typename S>
class tensor{

  static constexpr auto is_resizable = Resizable<S>;

  void resize(size_type s, value_type v) requires Resizable<S>
  {
      S::resize(m_data, s, std::move(v));
  }

};