Improve UI (#3)

Co-authored-by: Gregório Granado Magalhães <greg.magalhaes@gmail.com>

js/ui/.eslintrc.js

@@ -0,0 +1,20 @@
+module.exports = {
+	root: true,
+	parser: '@typescript-eslint/parser',
+	extends: ['eslint:recommended', 'plugin:@typescript-eslint/recommended', 'prettier'],
+	plugins: ['svelte3', '@typescript-eslint'],
+	ignorePatterns: ['*.cjs'],
+	overrides: [{ files: ['*.svelte'], processor: 'svelte3/svelte3' }],
+	settings: {
+		'svelte3/typescript': () => require('typescript')
+	},
+	parserOptions: {
+		sourceType: 'module',
+		ecmaVersion: 2019
+	},
+	env: {
+		browser: true,
+		es2017: true,
+		node: true
+	}
+};