introduce lint for client

Resolve #7998

packages/backend/.eslintrc.js

@@ -1,73 +1,9 @@
 module.exports = {
-	root: true,
-	parser: '@typescript-eslint/parser',
 	parserOptions: {
 		tsconfigRootDir: __dirname,
 		project: ['./tsconfig.json'],
 	},
-	plugins: [
-		'@typescript-eslint',
-		'import'
-	],
 	extends: [
-		'eslint:recommended',
-		'plugin:@typescript-eslint/recommended',
-		'plugin:import/recommended',
-		'plugin:import/typescript'
+		'../shared/.eslintrc.js',
 	],
-	rules: {
-		'indent': ['warn', 'tab', {
-			'SwitchCase': 1,
-			'MemberExpression': 'off',
-			'flatTernaryExpressions': true,
-			'ArrayExpression': 'first',
-			'ObjectExpression': 'first',
-		}],
-		'eol-last': ['error', 'always'],
-		'semi': ['error', 'always'],
-		'quotes': ['warn', 'single'],
-		'comma-dangle': ['warn', 'always-multiline'],
-		'keyword-spacing': ['error', {
-			'before': true,
-			'after': true,
-		}],
-		'key-spacing': ['error', {
-			'beforeColon': false,
-			'afterColon': true,
-		}],
-		/* TODO: path aliasを使わないとwarnする
-		'no-restricted-imports': ['warn', {
-			'patterns': [
-			]
-		}],
-		*/
-		'no-multi-spaces': ['error'],
-		'no-var': ['error'],
-		'prefer-arrow-callback': ['error'],
-		'no-throw-literal': ['warn'],
-		'no-param-reassign': ['warn'],
-		'no-constant-condition': ['warn'],
-		'no-empty-pattern': ['warn'],
-		'no-async-promise-executor': ['off'],
-		'no-useless-escape': ['off'],
-		'no-multi-spaces': ['warn'],
-		'no-multiple-empty-lines': ['error', { 'max': 1 }],
-		'no-control-regex': ['warn'],
-		'no-empty': ['warn'],
-		'no-inner-declarations': ['off'],
-		'no-sparse-arrays': ['off'],
-		'nonblock-statement-body-position': ['error', 'beside'],
-		'object-curly-spacing': ['error', 'always'],
-		'space-infix-ops': ['error'],
-		'space-before-blocks': ['error', 'always'],
-		'@typescript-eslint/no-var-requires': ['warn'],
-		'@typescript-eslint/no-inferrable-types': ['warn'],
-		'@typescript-eslint/no-empty-function': ['off'],
-		'@typescript-eslint/no-non-null-assertion': ['warn'],
-		'@typescript-eslint/no-misused-promises': ['error', {
-			'checksVoidReturn': false,
-		}],
-		'import/no-unresolved': ['off'],
-		'import/no-default-export': ['warn'],
-	},
 };