Add etke.cc to footer and package.json (#60)

* Add etke.cc to footer and package.json

* more links

src/components/Footer.tsx

@@ -0,0 +1,40 @@
+import { Box, Link, Typography } from "@mui/material";
+import { useEffect, useState } from "react";
+
+const Footer = () => {
+  const [version, setVersion] = useState<string | null>(null);
+  useEffect(() => {
+    const version = document.getElementById("js-version")?.textContent;
+    if (version) {
+      setVersion(version);
+    }
+  }, []);
+
+  return (<Box
+    component="footer"
+    sx={{
+      position: 'fixed',
+      zIndex: 100,
+      bottom: 0,
+      width: '100%',
+      bgcolor: "#eee",
+      borderTop: '1px solid',
+      borderColor: '#ddd',
+      p: 1,
+    }}>
+    <Typography variant="body2">
+      <Link sx={{ color: "#888", textDecoration: 'none' }} href="https://github.com/etkecc/synapse-admin" target="_blank">
+        Synapse-Admin
+      </Link> <Link href={`https://github.com/etkecc/synapse-admin/releases/tag/`+version} target="_blank">
+        <span style={{ fontWeight: 'bold', color: "#000" }}>{version}</span>
+      </Link> <Link sx={{ color: "#888", textDecoration: 'none' }} href="https://etke.cc/?utm_source=synapse-admin&utm_medium=footer&utm_campaign=synapse-admin" target="_blank">
+        by etke.cc
+      </Link> <Link sx={{ color: "#888", textDecoration: 'none' }} href="https://github.com/awesome-technologies/synapse-admin" target="_blank">
+        (originally developed by Awesome Technologies Innovationslabor GmbH)
+      </Link>
+    </Typography>
+  </Box>
+  );
+};
+
+export default Footer;