Document emoji picker (#4338)

Co-authored-by: Tom Moor <tom.moor@gmail.com>

app/components/EmojiPicker/components.tsx

@@ -0,0 +1,23 @@
+import styled from "styled-components";
+import Button from "~/components/Button";
+import { hover } from "~/styles";
+import Flex from "../Flex";
+
+export const EmojiButton = styled(Button)`
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 32px;
+  height: 32px;
+
+  &: ${hover},
+  &:active,
+  &[aria-expanded= "true"] {
+    opacity: 1 !important;
+  }
+`;
+
+export const Emoji = styled(Flex)<{ size?: number }>`
+  line-height: 1.6;
+  ${(props) => (props.size ? `font-size: ${props.size}px` : "")}
+`;