feat: in-page navigation component

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vanilla-framework",
-  "version": "4.44.0",
+  "version": "4.45.0",
   "author": {
     "email": "webteam@canonical.com",
     "name": "Canonical Webteam"

releases.yml

@@ -1,3 +1,9 @@
+- version: 4.45.0
+  features:
+    - component: In-page navigation
+      url: /docs/patterns/in-page-navigation
+      status: New
+      notes: We've introduced a new in-page navigation pattern.
 - version: 4.44.0
   features:
     - component: Hero section

scss/_base_placeholders.scss

@@ -97,6 +97,18 @@
     }
   }
 
+  %vf-pseudo-border--left {
+    position: relative;
+
+    &::before {
+      @extend %vf-pseudo-border;
+      bottom: 0;
+      height: auto;
+      top: 0;
+      width: 1px;
+    }
+  }
+
   %hr {
     background: $colors--theme--border-default;
     border: 0;