chore: 🤖 build out textarea component

addons/rose/app/components/rose/form/textarea.js

@@ -0,0 +1 @@
+export { default } from 'rose/components/rose/form/textarea';

addons/rose/app/templates/index.hbs

@@ -36,3 +36,30 @@ Dummy app index template
   @value="Text"
   disabled={{true}}
   />
+
+
+<Rose::Form::Textarea
+  @label="Label"
+  @value="Read only"
+  readonly={{true}}
+  />
+
+<Rose::Form::Textarea
+  @label="Label"
+  @helperText="Helper text"
+  @value="Text"
+  />
+
+<Rose::Form::Textarea
+  @label="Label"
+  @helperText="Helper text"
+  @value="Text"
+  @error={{true}}
+  />
+
+<Rose::Form::Textarea
+  @label="Label"
+  @helperText="Helper text"
+  @value="Text"
+  disabled={{true}}
+  />