Add ESLint Rule to Kafka Plugin

Signed-off-by: Aditya Kumar <aditya.kumar60@infosys.com>

.changeset/wise-fireants-doubt.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-kafka': patch
+---
+
+Added ESLint rule `no-top-level-material-ui-4-imports` in the Kafka plugin to migrate the Material UI imports.

plugins/kafka/.eslintrc.js

@@ -1 +1,5 @@
-module.exports = require('@backstage/cli/config/eslint-factory')(__dirname);
+module.exports = require('@backstage/cli/config/eslint-factory')(__dirname, {
+    rules: {
+      '@backstage/no-top-level-material-ui-4-imports': 'error',
+    },
+});

plugins/kafka/src/components/ConsumerGroupOffsets/ConsumerGroupOffsets.tsx

@@ -14,7 +14,9 @@
  * limitations under the License.
  */
 
-import { Box, Grid, Typography } from '@material-ui/core';
+import Box from '@material-ui/core/Box';
+import Grid from '@material-ui/core/Grid';
+import Typography from '@material-ui/core/Typography';
 import RetryIcon from '@material-ui/icons/Replay';
 import React from 'react';
 import { useConsumerGroupsOffsetsForEntity } from './useConsumerGroupsOffsetsForEntity';