prefer Tailwind's context.sortClassList() if it exists

We have to keep the existing code for now, since the plugin will prefer
the user's tailwind version. Hopefully we can remove this in future
versions.

src/index.js

@@ -59,25 +59,29 @@ function sortClasses(
     suffix = `${whitespace.pop() ?? ''}${classes.pop() ?? ''}`
   }
 
-  let classNamesWithOrder = []
-  for (let className of classes) {
-    let order =
-      env
-        .generateRules(new Set([className]), env.context)
-        .sort(([a], [z]) => bigSign(z - a))[0]?.[0] ?? null
-    classNamesWithOrder.push([className, order])
-  }
+  if (env.context.sortClassList) {
+    classes = env.context.sortClassList(classes)
+  } else {
+    let classNamesWithOrder = []
+    for (let className of classes) {
+      let order =
+        env
+          .generateRules(new Set([className]), env.context)
+          .sort(([a], [z]) => bigSign(z - a))[0]?.[0] ?? null
+      classNamesWithOrder.push([className, order])
+    }
 
-  classes = classNamesWithOrder
-    .sort(([, a], [, z]) => {
-      if (a === z) return 0
-      // if (a === null) return options.unknownClassPosition === 'start' ? -1 : 1
-      // if (z === null) return options.unknownClassPosition === 'start' ? 1 : -1
-      if (a === null) return -1
-      if (z === null) return 1
-      return bigSign(a - z)
-    })
-    .map(([className]) => className)
+    classes = classNamesWithOrder
+      .sort(([, a], [, z]) => {
+        if (a === z) return 0
+        // if (a === null) return options.unknownClassPosition === 'start' ? -1 : 1
+        // if (z === null) return options.unknownClassPosition === 'start' ? 1 : -1
+        if (a === null) return -1
+        if (z === null) return 1
+        return bigSign(a - z)
+      })
+      .map(([className]) => className)
+  }
 
   for (let i = 0; i < classes.length; i++) {
     result += `${classes[i]}${whitespace[i] ?? ''}`