bail out of the applyComplexClasses when it is not needed
bail out of the applyComplexClasses when it is not needed

There is no need in re-compiling tailwind or building expensive lookupt
tables when it turns out that we don't even need it.

We have a small overhead by walking the tree to check if `@apply`
exists. However this outweighs the slowness of re-generating tailwind +
expensive lookup tables.

tailwindlabs/tailwindcss,tailwindlabs/tailwindcss,tailwindcss/tailwindcss,tailwindlabs/tailwindcss