fix(typescript): Disable no-undef rule for .ts files

As recommended in https://typescript-eslint.io/docs/linting/troubleshooting/#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors

Author: MorevM

configurations/typescript/_settings.js

@@ -18,6 +18,7 @@ const base = {
 		'import/external-module-folders': ['node_modules', 'node_modules/@types'],
 	},
 	rules: {
+		'no-undef': 'off',
 		'no-duplicate-imports': 'off',
 		'unicorn/prefer-json-parse-buffer': 'off',
 		'jsdoc/require-returns-type': 'off',