feat: implement eslint

packages/config/eslintrc.config.cjs

@@ -0,0 +1,78 @@
+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+    root: true,
+    env: {
+        browser: true,
+        es2017: true,
+        node: true,
+    },
+    parserOptions: {
+        sourceType: 'module',
+        ecmaVersion: 2020,
+        project: './*/tsconfig.json',
+        extraFileExtensions: ['.svelte']
+    },
+    parser: '@typescript-eslint/parser',
+    plugins: [
+        '@typescript-eslint'
+    ],
+    extends: [
+        'eslint:recommended',
+        'plugin:@typescript-eslint/recommended',
+        'plugin:svelte/recommended',
+    ],
+    ignorePatterns: [
+        '*.d.ts',
+        '**/build/**', '**/node_modules/**', '**/.svelte-kit/**', '**/dist/**'
+    ],
+    overrides: [
+        {
+            'files': ['*.svelte'],
+            'parser': 'svelte-eslint-parser',
+            'parserOptions': {
+                'parser': '@typescript-eslint/parser'
+            }
+        },
+    ],
+    rules: {
+        /* Javascript / Typescript
+        ========================================= */
+        // Use spaces over tabs
+        'no-tabs': 'error',
+        indent: ['error', 4],
+        // Use single quote in javascript
+        quotes: ['error', 'single', {
+            avoidEscape: true,
+            allowTemplateLiterals: true
+        }],
+        // Avoid semicolons
+        semi: ['error', 'never'],
+        // Avoid ==
+        eqeqeq: 'error',
+        // Avoid trailing spaces
+        'no-trailing-spaces': ['error', { skipBlankLines: true }],
+        // Add a space between curlies
+        'object-curly-spacing': ['error', 'always'],
+        // Require a line at end of file
+        'eol-last': ['error', 'always'],
+        // Allow ts exceptions
+        '@typescript-eslint/ban-ts-comment': ['error', {
+            'ts-ignore': false,
+            'ts-nocheck': false,
+            'ts-expect-error': 'allow-with-description',
+        }],
+
+        /* Svelte
+        ========================================= */
+        // Use double quotes
+        'svelte/html-quotes': ['error', {
+            prefer: 'double',
+            dynamic: {
+                quoted: false,
+                avoidInvalidUnquotedInHTML: false,
+            }
+        }],
+    },
+    settings: {
+    },
+}