feat!: ESLint 9 Fixes (#307)

* chore: update postinstall scripts
* chore(lint): eslint automated fixes
* feat!: drop standard, sonarjs to work with eslint9

- This config allows arrow functions.

BREAKING CHANGES:

- Switches to eslint-config-eslint from eslint-config-standard.
- Also drops eslint-plugins-sonarjs because it doesn't work well
  with eslint9, and wants eslint8 and related plugins.
- Switches from eslint-plugin-prettier to eslint-config-prettier.

packages/config-checker/lib/config-checker.js

@@ -1,15 +1,15 @@
-'use strict'
+/* eslint no-console: "off", n/no-process-exit: "off" -- CLI app that gives users feedback */
 
-const fs = require('fs')
-const path = require('path')
+const fs = require('node:fs')
+const path = require('node:path')
 // noinspection NpmUsedModulesInstalled
-const process = require('process')
+const process = require('node:process')
 const configurationPaths = require('./configuration-paths')
 
 /**
  * Checks for the existence of a configuration file.
- * @param {string} moduleName - The name of the module to check for.
- * @param {string} pathPrefix - The prefix to add to the path.
+ * @param {string} moduleName The name of the module to check for.
+ * @param {string} pathPrefix The prefix to add to the path.
  * @returns {string[]} - The paths to the configuration files.
  */
 const configChecker = (moduleName, pathPrefix = '') => {

packages/config-checker/lib/configuration-paths.js

@@ -1,10 +1,8 @@
-'use strict'
-
-const path = require('path')
+const path = require('node:path')
 
 /**
  * Returns an array of configuration paths.
- * @param {string} moduleName - The name of the module to check for.
+ * @param {string} moduleName The name of the module to check for.
  * @returns {string[]} - The paths to the configuration files.
  */
 const configurationPaths = moduleName => {