move vendored uk components to templates

app/templates/components/uk_components/textarea/_textarea.scss

@@ -0,0 +1,32 @@
+@import "../../settings/all";
+@import "../../tools/all";
+@import "../../helpers/all";
+
+@import "../error-message/error-message";
+@import "../hint/hint";
+@import "../label/label";
+
+@include govuk-exports("govuk/component/textarea") {
+  .govuk-textarea {
+    @include govuk-font($size: 19, $line-height: 1.25);
+    @include govuk-focusable;
+
+    box-sizing: border-box; // should this be global?
+    display: block;
+    width: 100%;
+    min-height: 40px;
+    @include govuk-responsive-margin(6, "bottom");
+    padding: govuk-spacing(1);
+
+    resize: vertical;
+
+    border: $govuk-border-width-form-element solid $govuk-input-border-colour;
+    border-radius: 0;
+
+    -webkit-appearance: none;
+  }
+
+  .govuk-textarea--error {
+    border: $govuk-border-width-form-element-error solid $govuk-error-colour;
+  }
+}