Add linters (#10)

* Add prettier for code formatting

Create a prettier config file - `.prettierrc` that hosts formatting configuration.

* Add eslint with default configurations for a Node.js environment

Include npm scripts for running eslint and prettier with `lint` and `format` scripts.

Author: WebDevCaptain

.prettierrc

@@ -0,0 +1,9 @@
+{
+  "semi": true,
+  "singleQuote": false,
+  "tabWidth": 2,
+  "useTabs": false,
+  "printWidth": 80,
+  "trailingComma": "none",
+  "endOfLine": "lf"
+}

eslint.config.mjs

@@ -0,0 +1,8 @@
+import globals from "globals";
+import pluginJs from "@eslint/js";
+
+/** @type {import('eslint').Linter.Config[]} */
+export default [
+  { languageOptions: { globals: globals.node } },
+  pluginJs.configs.recommended
+];