tailwindcss 4.1.8

Upgrade: Do not migrate declarations that look like candidates in <style> blocks (#18057, 18068)
Upgrade: Don't error when looking for tailwindcss in pnpm monorepos (#18065)
Upgrade: Don't error when updating dependencies in pnpm monorepos (#18065)
Upgrade: Migrate deprecated order-none to order-0 (#18126)
Support Leptos class: attributes when extracting classes (#18093)
Fix "Cannot read properties of undefined" crash on malformed arbitrary value (#18133)
Upgrade: Migrate -mt-[0px] to mt-[0px] instead of the other way around (#18154)
Fix Haml pre-processing crash when there is no \n at the end of the file (#18155)
Ignore .pnpm-store folders by default (can be overridden by @source … rules) (#18163)
Fix PostCSS crash when calling toJSON() (#18083)