test: cover parenthesized cn arguments, nested --value parentheses and unknown rotate axes

Refs #687

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Author: owjs3901

libs/extractor/src/lib.rs

@@ -14744,6 +14744,7 @@ const on = false;
         "<Box className={twMerge(`p-4`, 'p-2!', 'hover:p-4', 'hover:p-1')} />",
         r#"<div className="a b c" />"#
     )]
+    #[case("<Box className={cn(('p-4'), 'p-2')} />", r#"<div className="a" />"#)]
     #[case(
         "<Box className={cn('p-4', cond && 'p-2')} />",
         r#"-<div className={cn("p-4", cond && "p-2") || ""} />"#

libs/extractor/src/tailwind_custom.rs

@@ -273,7 +273,7 @@ mod tests {
     #[serial]
     fn functional_utilities_read_their_value_and_modifier() {
         set_tailwind_css(
-            "@theme { --tab-size-github: 8; --color-brand: #0af; --spacing-gutter: 3rem; } @utility tab-* { tab-size: --value(--tab-size-*, integer, [integer]); } @utility pct-* { width: --value(percentage); } @utility lit-* { display: --value('inline-flex', 'grid'); } @utility num-* { line-height: --value(number); } @utility bg-glow-* { background: --value(--color-*, [color]); box-shadow: 0 0 8px --modifier([percentage], number); } @utility gap-* { gap: --value(--spacing-*); } @utility len-* { width: --value([length]); } @utility pc-* { height: --value([percentage]); } @utility many-* { a: --value([url], [number], [unknown]); } @utility q-* { content: \"--value(x\"; } @utility space-* { gap: --spacing(4); } @utility bad-* { width: --value(unknown-type); } @utility mod-* { width: --value(integer); color: --modifier('red'); }",
+            "@theme { --tab-size-github: 8; --color-brand: #0af; --spacing-gutter: 3rem; } @utility tab-* { tab-size: --value(--tab-size-*, integer, [integer]); } @utility pct-* { width: --value(percentage); } @utility lit-* { display: --value('inline-flex', 'grid'); } @utility num-* { line-height: --value(number); } @utility bg-glow-* { background: --value(--color-*, [color]); box-shadow: 0 0 8px --modifier([percentage], number); } @utility gap-* { gap: --value(--spacing-*); } @utility len-* { width: --value([length]); } @utility pc-* { height: --value([percentage]); } @utility many-* { a: --value([url], [number], [unknown]); } @utility nest-* { a: --value(fn(x), integer); } @utility nest-* { a: --value(fn(x), integer); } @utility q-* { content: \"--value(x\"; } @utility space-* { gap: --spacing(4); } @utility bad-* { width: --value(unknown-type); } @utility mod-* { width: --value(integer); color: --modifier('red'); }",
         );
         assert_eq!(written("tab-4"), pairs(&[("tab-size", "4")]));
         assert_eq!(written("tab-github"), pairs(&[("tab-size", "8")]));
@@ -306,6 +306,8 @@ mod tests {
         assert_eq!(declarations_of("len-3px"), None);
         assert_eq!(written("many-[1]"), pairs(&[("a", "1")]));
         assert_eq!(declarations_of("many-[x]"), None);
+        assert_eq!(written("nest-4"), pairs(&[("a", "4")]));
+        assert_eq!(written("nest-4"), pairs(&[("a", "4")]));
         for class in ["space-4", "bad-4", "q-1"] {
             assert_eq!(declarations_of(class), None, "{class}");
         }

libs/extractor/src/tailwind_misc.rs

@@ -879,6 +879,10 @@ mod tests {
     #[case("-indent")]
     #[case("-table-auto")]
     #[case("antialiased-")]
+    #[case("rotate-w-45")]
+    #[case("rotate-x")]
+    #[case("rotate-w-45")]
+    #[case("rotate-x")]
     fn unknown_utilities_stay_as_written(#[case] class: &str) {
         assert_eq!(declarations_of(class), None, "{class}");
     }