chore(code-lint): Add lint to check (VSCODE-215) (#230)

.eslintignore

@@ -1 +1,4 @@
-node_modules/
+node_modules
+out
+dist
+scripts

.eslintrc.js

@@ -0,0 +1,64 @@
+const typescriptEslintEslintPlugin = require('@typescript-eslint/eslint-plugin');
+
+// Overrides do not work with extends.
+const ruleOverridesForJs = Object.keys(typescriptEslintEslintPlugin.rules).reduce(
+  (overrides, rule) => ({ ...overrides, [`@typescript-eslint/${rule}`]: 0 }), {}
+);
+
+module.exports = {
+  plugins: ['mocha', '@typescript-eslint'],
+  parser: '@typescript-eslint/parser', // Specifies the ESLint parser.
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'module',
+    project: [
+      './tsconfig.json'
+    ]
+  },
+  extends: [
+    'eslint-config-mongodb-js/react',
+    'plugin:@typescript-eslint/eslint-recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:@typescript-eslint/recommended-requiring-type-checking'
+  ],
+  rules: {
+    'chai-friendly/no-unused-expressions': 0,
+    'object-curly-spacing': [2, 'always'],
+    'no-empty-function': 0,
+    'valid-jsdoc': 0,
+    'react/sort-comp': 0, // Does not seem work as expected with typescript.
+    '@typescript-eslint/no-empty-function': 0,
+    '@typescript-eslint/no-use-before-define': 0,
+    '@typescript-eslint/no-explicit-any': 0,
+    '@typescript-eslint/no-var-requires': 0,
+    '@typescript-eslint/no-unused-vars': 2,
+    '@typescript-eslint/explicit-module-boundary-types': 0,
+    '@typescript-eslint/ban-types': 0,
+    'mocha/no-skipped-tests': 1,
+    'mocha/no-exclusive-tests': 2,
+    'semi': 0,
+    '@typescript-eslint/semi': [2, 'always'],
+    'no-console': [1, { allow: ['warn', 'error', 'info'] }],
+    'no-shadow': 0,
+    'no-use-before-define': 0,
+    'no-cond-assign': [2, 'except-parens'],
+    'space-before-function-paren': 0,
+    '@typescript-eslint/no-floating-promises': 0,
+
+    'restrict-template-expressions': 0,
+    '@typescript-eslint/restrict-template-expressions': 0,
+
+    // VV These rules we'd like to turn off one day so they error.
+    '@typescript-eslint/no-unsafe-assignment': 'warn',
+    '@typescript-eslint/no-unsafe-member-access': 'warn',
+    '@typescript-eslint/no-unsafe-call': 'warn',
+    '@typescript-eslint/no-unsafe-return': 'warn'
+  },
+  overrides: [{
+    files: ['**/*.js'],
+    rules: {
+      ...ruleOverridesForJs,
+      semi: [2, 'always']
+    }
+  }]
+};