hw7 started, added project info page

site/src/main/components/Content.tsx

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+import Container from '@mui/material/Container';
+import Grid from '@mui/material/Grid';
+import {mainCards} from "../../data";
+import BigCard from "./BigCard"
+const cardData = mainCards
+
+function Content() {
+  return (
+    <Container maxWidth="xl" sx={{pr:{md:"0px !important",xs:"20px"}}}>
+      {cardData.map((item, index) => (
+        <Grid key={index} size={{ xs: 12, md: 6 }} >
+          <BigCard data={ item } cardNum={index} />
+        </Grid>
+      ))}
+    </Container>
+  );
+}
+
+export default Content;