chore: Add ESLint and Prettier configuration files for code quality (#26)

- Introduced `.prettierrc` for consistent code formatting with specified
rules.
- Added `.prettierignore` to exclude certain directories from
formatting.
- Created `eslint.config.mjs` to configure ESLint with TypeScript
support and various plugins for improved code quality.
- Updated `package.json` and `package-lock.json` to include necessary
ESLint and Prettier dependencies.
- Added `tsconfig.json` for TypeScript compilation settings.
- Modified `vitest.config.ts` to export the configuration properly.

These changes enhance code quality and maintainability by integrating
ESLint and Prettier into the project.

Author: anatolyshipitz

.github/workflows/code-quality.yml

@@ -14,8 +14,10 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
-      - name: Run linting
-        run: echo "Linting..."
+      - name: Install dependencies
+        run: cd workers/main && npm ci
+      - name: Run ESLint
+        run: cd workers/main && npm run eslint
 
   sonarqube:
     name: SonarQube

workers/main/.prettierignore

@@ -0,0 +1,4 @@
+# Add files here to ignore them from prettier formatting
+/dist
+/coverage
+/.nx/cache

workers/main/.prettierrc

@@ -0,0 +1,11 @@
+{
+  "trailingComma": "all",
+  "printWidth": 80,
+  "tabWidth": 2,
+  "semi": true,
+  "singleQuote": true,
+  "bracketSpacing": true,
+  "bracketSameLine": false,
+  "endOfLine": "auto",
+  "quoteProps": "consistent"
+}

workers/main/eslint.config.mjs

@@ -0,0 +1,66 @@
+import tseslint from '@typescript-eslint/eslint-plugin';
+import tsparser from '@typescript-eslint/parser';
+import prettier from 'eslint-plugin-prettier';
+import eslintImport from 'eslint-plugin-import';
+import simpleImportSort from 'eslint-plugin-simple-import-sort';
+
+export default [
+  {
+    settings: {
+      'import/resolver': {
+        typescript: {
+          extensions: [".ts"]
+        },
+      },
+    },
+    languageOptions: {
+      ecmaVersion: 2021,
+      sourceType: 'module',
+      parser: tsparser,
+      parserOptions: {
+        project: './tsconfig.json',
+      },
+    },
+    plugins: {
+      '@typescript-eslint': tseslint,
+      'prettier': prettier,
+      'import': eslintImport,
+      'simple-import-sort': simpleImportSort,
+    },
+    ignores: [
+      'node_modules',
+      'dist',
+      'eslint.config.mjs',
+      'coverage',
+      'coverage/*',
+      'coverage/**/*'
+    ],
+    rules: {
+      ...tseslint.configs.recommended.rules,
+      ...tseslint.configs['recommended-requiring-type-checking'].rules,
+      ...prettier.configs.recommended.rules,
+
+      'prettier/prettier': 'error',
+      '@typescript-eslint/no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
+      'no-console': 'warn',
+      'no-debugger': 'warn',
+      'import/no-unresolved': 'error',
+      'padding-line-between-statements': [
+        'error',
+        { blankLine: 'always', prev: '*', next: 'return' },
+        {
+          blankLine: 'always',
+          prev: ['const', 'let', 'var', 'import'],
+          next: '*',
+        },
+        {
+          blankLine: 'any',
+          prev: ['const', 'let', 'var', 'import'],
+          next: ['const', 'let', 'var', 'import'],
+        },
+      ],
+      'simple-import-sort/imports': 'error',
+      'simple-import-sort/exports': 'error',
+    },
+  },
+];