Add ESLint Rule to Vault Plugin

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

.changeset/seven-monkeys-happen.md

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

plugins/vault/.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/vault/dev/index.tsx

@@ -19,7 +19,8 @@ import { Content, Header, HeaderLabel, Page } from '@backstage/core-components';
 import { createDevApp } from '@backstage/dev-utils';
 import { EntityProvider } from '@backstage/plugin-catalog-react';
 import { TestApiProvider } from '@backstage/test-utils';
-import { Box, Typography } from '@material-ui/core';
+import Box from '@material-ui/core/Box';
+import Typography from '@material-ui/core/Typography';
 import SomeIcon from '@material-ui/icons/Storage';
 import React from 'react';
 import { VaultApi, vaultApiRef } from '../src/api';

plugins/vault/src/components/EntityVaultTable/EntityVaultTable.tsx

@@ -17,7 +17,8 @@ import React from 'react';
 import { Entity } from '@backstage/catalog-model';
 import { Link, Table, TableColumn } from '@backstage/core-components';
 import { useApi } from '@backstage/core-plugin-api';
-import { Box, Typography } from '@material-ui/core';
+import Box from '@material-ui/core/Box';
+import Typography from '@material-ui/core/Typography';
 import Edit from '@material-ui/icons/Edit';
 import Visibility from '@material-ui/icons/Visibility';
 import Alert from '@material-ui/lab/Alert';