FEATURE: Expose getClassOrder from Tailwind

[bkrmendy]

Resolves: #24

This PR exposes the getClassOrder function from Tailwind, and adds a test suite to showcase how it can be used.

getClassOrder can be used to implement functionality in the browser that's similar to what https://github.com/tailwindlabs/prettier-plugin-tailwindcss does. The concrete use cases for this could be

• Sorting tailwind classes in a text editor that's running in the browser
• Finding out what CSS properties and values will be applied to a given element. Sorting is relevant here, because if an element has conflicting props (for example left-1 inset-x-2, where left-1 set the left property, and inset-x sets both left and right), we need to know in what order Tailwind will apply these classes to which TW class takes effect.

[mhsdesign]

Thanks for the excellent work and including the tests.

i like that this is still fairly simple and does not increase bundle size worth mentioning:

dist/module.esm.js 315.6kb

after:

dist/module.esm.js 316.1kb