feature #1382 Re-add webpack-manifest-plugin dependency, which was previously embedded in #921 (Kocal)

This PR was merged into the main branch.

Discussion
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Re-add `webpack-manifest-plugin` dependency, which was previously embedded in #921

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes <!-- please update CHANGELOG.md file -->
| Deprecations? | no <!-- please update CHANGELOG.md file -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT

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While working on #1381, I noticed that `lib/webpack-manifest-plugin/` was https://github.com/shellscape/webpack-manifest-plugin embedded with fix shellscape/webpack-manifest-plugin#249

The package was embedded because it was possible for the upstream PR to never be merged, but it has been merged and released.

We should not have any BCs from https://github.com/shellscape/webpack-manifest-plugin/releases

Commits
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d5d6b7b Re-add webpack-manifest-plugin as a dependency

Author: Kocal

CHANGELOG.md

@@ -11,6 +11,8 @@
 If you manually specified the option `insert`, now it can only be a selector or the path to the module.
 Follow the [style-loader migration guide](https://github.com/webpack-contrib/style-loader/releases/tag/v4.0.0) to upgrade!
 
+* Re-add `webpack-manifest-plugin` dependency, which was previously embedded in https://github.com/symfony/webpack-encore/pull/921
+
 ## 5.1.0
 
 ### Features

eslint.config.js

@@ -30,7 +30,6 @@ module.exports = [
                 ...globals.node,
             },
         },
-        ignores: ['lib/webpack-manifest-plugin']
     },
     {
         'rules': {

lib/plugins/manifest.js

@@ -13,7 +13,7 @@
  * @import WebpackConfig from '../WebpackConfig'
  */
 
-const { WebpackManifestPlugin } = require('../webpack-manifest-plugin');
+const { WebpackManifestPlugin } = require('webpack-manifest-plugin');
 const PluginPriorities = require('./plugin-priorities');
 const applyOptionsCallback = require('../utils/apply-options-callback');
 const copyEntryTmpName = require('../utils/copyEntryTmpName');