Support JIT engine changes and new features

[muhammadsammy]

https://tailwindcss.com/docs/just-in-time-mode#new-features

Can be enabled with mode: 'jit'

Supported:

• JIT: All variants are enabled.
• JIT: Built-in important modifier e.g. font-bold !font-medium, sm:hover:!tw-font-bold
• JIT: Add universal shorthand color opacity syntax (JIT: Add universal shorthand color opacity syntax #239)
• JIT: Add per-side border color utilities (JIT: Add per-side border color utilities #238)
• JIT: Add support for before and after pseudo-element variants and content utilities (JIT: Add support for before and after pseudo-element variants and content utilities  #237)
• JIT: Add exhaustive pseudo-class and pseudo-element variant support (JIT: Add exhaustive pseudo-class and pseudo-element variant support  #236)
• JIT: Add new peer-* variants for styling based on sibling state (JIT: Add new peer-* variants for styling based on sibling state  #233)
• JIT: Add caret-color utilities (JIT: Add caret-color utilities #235)
• JIT: Remove need for transform class when using classes like scale-*, rotate-*, etc. (JIT: Remove need for transform class when using classes like scale-*, rotate-*, etc.  #232)
• JIT: Remove need for filter and backdrop-filter classes when using classes like contrast-*,

won't support:

• Arbitrary values e.g. w-[762px] h-[918px]
• All variants can be stacked together e.g. md:dark:disabled:focus:hover:bg-gray-400 ([JIT engine] Generate classnames that allow variants to be stacked together #206)