Add :dir() (#1127)

This is a Baseline 2023 feature.

The versions match https://caniuse.com/css-dir-pseudo.

The identifier is "dir-pseudo" instead of just "dir" because there's
also an HTML dir attribute that we may want to represent later.

Co-authored-by: Daniel D. Beck <[email protected]>

Author: foolip

features/dir-pseudo.dist.yml

@@ -0,0 +1,22 @@
+# Generated from: dir-pseudo.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+name: :dir()
+description: "The `:dir()` CSS functional pseudo-class matches elements by text direction, either right to left (`rtl`) or left to right (`ltr`)."
+spec: https://drafts.csswg.org/selectors-4/#the-dir-pseudo
+group: css
+caniuse: css-dir-pseudo
+usage_stats: https://chromestatus.com/metrics/feature/timeline/popularity/3741
+status:
+  baseline: low
+  baseline_low_date: 2023-12-07
+  support:
+    chrome: "120"
+    chrome_android: "120"
+    edge: "120"
+    firefox: "49"
+    firefox_android: "49"
+    safari: "16.4"
+    safari_ios: "16.4"
+compat_features:
+  - css.selectors.dir

features/dir-pseudo.yml

@@ -0,0 +1,8 @@
+name: :dir()
+description: "The `:dir()` CSS functional pseudo-class matches elements by text direction, either right to left (`rtl`) or left to right (`ltr`)."
+spec: https://drafts.csswg.org/selectors-4/#the-dir-pseudo
+group: css
+caniuse: css-dir-pseudo
+usage_stats: https://chromestatus.com/metrics/feature/timeline/popularity/3741
+compat_features:
+  - css.selectors.dir