feat: move componentsto ui directory

src/components/ui/Box.tsx

@@ -0,0 +1,25 @@
+import * as React from 'react';
+import Box from '@mui/material/Box';
+
+interface BoxProps {
+  width: number | string,
+  height: number | string,
+  background: string,
+  radius: string,
+  children?: JSX.Element,
+};
+
+export const SimpleBox = ({ width, height, background, radius, children }: BoxProps) => {
+  return (
+    <Box
+      sx={{
+        width: width,
+        height: height,
+        backgroundColor: background,
+        borderRadius: radius,
+      }}
+    >
+      {children}
+    </Box>
+  );
+}