feat(css/minifier) Follow the CSS spec more rigorously (#6291)

**Description:**

Full refactor of the "calc" simplification to be more compliant with the spec.

Author: ghostd

crates/swc_css_minifier/src/compressor/calc_sum.rs

@@ -25,7 +25,6 @@ mod supports;
 mod time;
 mod transform_function;
 mod unicode_range;
-mod unit;
 mod url;
 
 pub fn compressor() -> impl VisitMut {

crates/swc_css_minifier/src/compressor/mod.rs

@@ -1 +1 @@
-@container(inline-size>=200px){h2{font-size:calc(1.2em + 1cqi)}}
+@container(inline-size>=200px){h2{font-size:calc(1cqi + 1.2em)}}

crates/swc_css_minifier/src/compressor/unit/mod.rs

@@ -85,3 +85,113 @@
 .class22 {
     width: calc(1px + 2unknown);
 }
+
+.class23 {
+    width: calc(1hz + 1khz);
+}
+
+.class24 {
+    width: calc(1khz + 1hz);
+}
+
+.class25 {
+    width: calc(1ms + 1s);
+}
+
+.class26 {
+    width: calc(1ms + 1s);
+}
+
+.class27 {
+    width: calc(1dppx + 1x);
+}
+
+.class28 {
+    width: calc(1x + 1dppx);
+}
+
+.class29 {
+    width: calc(1x + 96dpi);
+}
+
+.class30 {
+    width: calc(96dpi + 1x);
+}
+
+.class31 {
+    width: calc(1dppx + 96dpi);
+}
+
+.class32 {
+    width: calc(96dpi + 1dppx);
+}
+
+.class33 {
+    width: calc(1dpcm + 1dpi);
+}
+
+.class34 {
+    width: calc(1dpcm + 1dpi);
+}
+
+.class35 {
+    width: calc(1cm + 1mm);
+}
+
+.class36 {
+    width: calc(1mm + 1cm);
+}
+
+.class37 {
+    width: calc(1mm + 1q);
+}
+
+.class38 {
+    width: calc(1q + 1mm);
+}
+
+.class39 {
+    width: calc(1cm + 1q);
+}
+
+.class40 {
+    width: calc(1q + 1cm);
+}
+
+.class39 {
+    width: calc(1in + 1px);
+}
+
+.class40 {
+    width: calc(1px + 1in);
+}
+
+.class41 {
+    width: calc(1pc + 1in);
+}
+
+.class42 {
+    width: calc(1in + 1pc);
+}
+
+.class43 {
+    width: calc(1pt + 1in);
+}
+
+.class44 {
+    width: calc(1in + 1pt);
+}
+
+.class45 {
+    width: calc(1pt + 1pc);
+}
+
+.class46 {
+    width: calc(1pc + 1pt);
+}
+.class47 {
+    width: calc(1px + 1pc);
+}
+.class48 {
+    width: calc(1pc + 1px);
+}

crates/swc_css_minifier/tests/fixture/compress-calc/add-sub/output.min.css

@@ -1 +1 @@
-.class1{width:calc(((var(--a) + 4px)*2)*2)}.class2{width:calc(((var(--a) + 4px)*2)*2 + 4px)}
+.class1{width:calc(4*(4px + var(--a)))}.class2{width:calc(4px + 4*(4px + var(--a)))}

crates/swc_css_minifier/tests/fixture/compress-calc/container-condition/output.min.css

@@ -1 +1 @@
-.class1{width:calc(1/100)}.class2{width:calc(5/1e6)}.class3{width:calc(100%/3*3)}.class4{width:calc(calc(100%/3)*3)}
+.class1{width:.01}.class2{width:calc(5*1e-6)}.class3,.class4{width:100%}

crates/swc_css_minifier/tests/fixture/compress-calc/convert-units/input.css

@@ -1 +1 @@
-.class1,.class2{width:2px}.class3{width:-webkit-calc(50% - 25px)}.class4{width:-webkit-calc(1px + 2px/2)}.class5,.class6{width:2px}
+.class1,.class2{width:2px}.class3{width:-webkit-calc(50% - 25px)}.class4,.class5,.class6{width:2px}