Decouple Validation from Form to allow it to be used in other contexts than Forms

[alexandreelise]

Hey Joomla Core Team and other Super Joomlers of the community,

I was wondering if it might be possible, maybe in Joomla 6 or 7 to decouple the validation logic to their own classes for example Joomla\Validation\Validator that might reuse the Input / Output Filters and allow detailled errors that could be rendered using possibly the ErrorRenderer or a new ValidationErrorRenderer that could be used by each client (administrator, site, api, cli, installation). What do you think?