chore(deps-dev): bump eslint from 8.57.0 to 9.3.0 (#136)

* chore(deps-dev): bump eslint from 8.57.0 to 9.3.0

Bumps [eslint](https://github.com/eslint/eslint) from 8.57.0 to 9.3.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v8.57.0...v9.3.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Remove unnecessary `eslint-config-prettier`

Formatting rules are deprecated since ESLint v8.53.0.

For more information, see:
- https://github.com/eslint/eslint/releases/tag/v8.53.0
- https://eslint.org/blog/2023/10/deprecating-formatting-rules

* Migrate ESLint config to new flat config format

* Fix and rename eslint config file

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Germán Freixinós <14282156+germanfrelo@users.noreply.github.com>

eslint.config.mjs

@@ -0,0 +1,26 @@
+import js from "@eslint/js";
+import globals from "globals";
+
+export default [
+	{
+		files: ["**/*.js"],
+		languageOptions: {
+			sourceType: "commonjs",
+		},
+	},
+	{
+		languageOptions: {
+			// Enable all predefined browser global variables
+			globals: globals.browser,
+		},
+	},
+	// ESLint's predefined config that enables its recommended rules
+	js.configs.recommended,
+	{
+		// Global ignores patterns
+		ignores: [
+			// Default ignore patterns: ["**/node_modules/", ".git/"]
+			"_site/",
+		],
+	},
+];