added tooling (eslint, typescript and prettier)

tooling/prettier/index.mjs

@@ -0,0 +1,28 @@
+/** @typedef  {import("prettier").Config} PrettierConfig */
+/** @typedef  {import("@ianvs/prettier-plugin-sort-imports").PluginConfig} SortImportsConfig */
+
+/** @type { PrettierConfig | SortImportsConfig } */
+const config = {
+  plugins: [
+    '@ianvs/prettier-plugin-sort-imports',
+  ],
+  importOrder: [
+    '^(react/(.*)$)|^(react$)|^(react-native(.*)$)',
+    '<THIRD_PARTY_MODULES>',
+    '',
+    '^@mixan/(.*)$',
+    '',
+    '^~/',
+    '^[../]',
+    '^[./]',
+  ],
+  importOrderParserPlugins: ['typescript', 'jsx', 'decorators-legacy'],
+  importOrderTypeScriptVersion: '4.4.0',
+  singleQuote: true,
+  semi: true,
+  trailingComma: 'es5',
+  printWidth: 80,
+  tabWidth: 2,
+};
+
+export default config;