Rewriter: Implement tailwind-class-sorter built-in rewriter

[marcoroth]

Building on top of #759, this pull request implements a tailwind-class-sorter rewriter that's going to be built-in to the @herb-tools/rewriter package.

Other tools will be able to refer to this built-in rewriter just by its name tailwind-class-sorter. This is going to enable us to plug it in to the @herb-tools/formatter (see #671).

Example:

  import { Herb } from "@herb-tools/node-wasm"
  import { IdentityPrinter } from "@herb-tools/printer"
  import { TailwindClassSorterRewriter } from "@herb-tools/rewriter"

  await Herb.load()

  const rewriter = new TailwindClassSorterRewriter()
  await rewriter.initialize({ baseDir: process.cwd() })

  const input = `<div class="px-4 bg-blue-500 text-white"></div>`
  const parseResult = Herb.parse(input, { track_whitespace: true })

  const rewritten = rewriter.rewrite(parseResult, { baseDir: process.cwd() })
  const output = IdentityPrinter.print(rewritten.value)

  console.log(output)
  // Output: <div class="bg-blue-500 px-4 text-white"></div>