dark mode with bootstrap complete components

Used https://github.com/vinorodrigues/bootstrap-dark-5/releases/tag/v1.0.0

scss/dark/bootstrap/forms/_input-group.scss

@@ -0,0 +1,16 @@
+// Textual addons
+
+.input-group-text {
+  color: $input-group-addon-color-alt;
+  background-color: $input-group-addon-bg-alt;
+  border: $input-border-width solid $input-group-addon-border-color-alt;
+}
+
+// Rounded corners
+
+.input-group {
+  $validation-messages: "";
+  @each $state in map-keys($form-validation-states-alt) {
+    $validation-messages: $validation-messages + ":not(." + unquote($state) + "-tooltip)" + ":not(." + unquote($state) + "-feedback)";
+  }
+}  // WHAT DOES THIS DO???