docs: document the changes merged on 2026-10-14 in the core and Flexy

[anoziere]

Documents, in the Next version only:

• feat(api): sort products by the date they were put in their category thelia#4150 sort of products by the date they were added to their category
• fix(config): read default_lang_without_translation as an integer thelia#4151 default_lang_without_translation read as an integer, strict mode in the front loops
• fix(legal): refuse a French VAT number that does not carry a full SIREN thelia#4084 French VAT number without a full SIREN refused
• fix(media): delete the files of an image or document with its row thelia#4067 files and published copies removed with an image or a document, API included
• fix(mailer): pass the message language to the parser without a session thelia#4115 mails rendered in the message language without a session
• feat: let a shop leave the legal identifiers of a business address optional thelia-templates/flexy#282 address_legal_identifiers_required setting
• feat: show the order just placed on the confirmation page thelia-templates/flexy#265 confirmation page order, order-placed.additional-payment-info hook, payment without gateway
• perf: load the controllers of page components on demand thelia-templates/flexy#287 lazy Stimulus controllers