feat: add textarea min-lines

Author: SimeonC

system/core/src/components/TextAreaCore.ts

@@ -13,7 +13,8 @@ export const textareaSizingStyles = css`
   ${inputStyles}
   width: var(--tk-input-width);
   --tk-textarea-height: calc(
-    var(--tk-input-height) - (var(--tk-input-border-width) * 2)
+    2lh + (var(--tk-input-border-width) * 2) +
+      (var(--tk-input-vertical-padding) * 2)
   );
   min-height: var(--tk-textarea-height);
   resize: vertical;