add basic vite setup

demos/setup/style.scss

@@ -0,0 +1,59 @@
+$colorBlack: #000;
+
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+html {
+  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+  line-height: 1.5;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+body {
+  margin: 1rem;
+}
+
+::-webkit-scrollbar {
+  width: 14px;
+  height: 14px;
+}
+
+::-webkit-scrollbar-track {
+  border: 4px solid transparent;
+  background-clip: padding-box;
+  border-radius: 8px;
+  background-color: transparent;
+}
+
+::-webkit-scrollbar-thumb {
+  border: 4px solid rgba(0, 0, 0, 0);
+  background-clip: padding-box;
+  border-radius: 8px;
+  background-color: rgba(0, 0, 0, 0);
+}
+
+:hover::-webkit-scrollbar-thumb {
+  background-color: rgba(0, 0, 0, 0.1);
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background-color: rgba(0, 0, 0, 0.15);
+}
+
+::-webkit-scrollbar-button {
+  display: none;
+  width: 0;
+  height: 0;
+}
+
+::-webkit-scrollbar-corner {
+  background-color: transparent;
+}
+
+.ProseMirror:focus {
+  outline: none;
+}