Allow adding an account to a collection directly from the profile page (#39080)

app/javascript/mastodon/features/collection_adder/collection_toggle.module.scss

@@ -0,0 +1,12 @@
+.wrapper {
+  --list-item-gap: 16px;
+  --list-item-padding-block: 12px;
+
+  &:not(:last-child) {
+    border-bottom: 1px solid var(--color-border-primary);
+  }
+
+  &:has(input:disabled) {
+    color: var(--color-text-secondary);
+  }
+}