fix: remove border radius from inputs

Author: RickEyre

packages/panda-san/src/form/input.scss

@@ -3,6 +3,7 @@
   background-color: transparent;
   border: 0;
   border-bottom: solid px-to-rem(2px);
+  border-radius: none;
   color: inherit;
   padding: px-to-rem(12px) px-to-rem(4px);
   width: 100%;