Add ESLint Rule to Github-Deployments Plugin

Signed-off-by: AmbrishRamachandiran <ambrish.r@infosys.com>

.changeset/slimy-panthers-yawn.md

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

plugins/github-deployments/.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/github-deployments/src/components/GithubDeploymentsTable/GithubDeploymentsTable.tsx

@@ -15,7 +15,8 @@
  */
 import React from 'react';
 import { GithubDeployment } from '../../api';
-import { Typography, makeStyles } from '@material-ui/core';
+import Typography from '@material-ui/core/Typography';
+import { makeStyles } from '@material-ui/core/styles';
 import SyncIcon from '@material-ui/icons/Sync';
 import { columnFactories } from './columns';
 import { defaultDeploymentColumns } from './presets';

plugins/github-deployments/src/components/GithubDeploymentsTable/columns.tsx

@@ -17,7 +17,8 @@
 import React from 'react';
 import { GithubDeployment } from '../../api';
 import { DateTime } from 'luxon';
-import { Box, Typography } from '@material-ui/core';
+import Box from '@material-ui/core/Box';
+import Typography from '@material-ui/core/Typography';
 import {
   StatusPending,
   StatusRunning,