add prettier and auto formatting

.editorconfig

@@ -0,0 +1,7 @@
+[*]
+end_of_line = lf
+indent_style = tab
+indent_size = 4
+
+[*{js,ts}]
+charset = utf-8

.eslintrc.cjs

@@ -1,39 +1,37 @@
 module.exports = {
-	"env": {
-		"browser": true,
-		"es2021": true
+	env: {
+		browser: true,
+		es2021: true,
 	},
-	"extends": "eslint:recommended",
-	"overrides": [
+	extends: 'eslint:recommended',
+	overrides: [
 		{
-			"env": {
-				"node": true
+			env: {
+				node: true,
 			},
-			"files": [
-				".eslintrc.{js,cjs}"
-			],
-			"parserOptions": {
-				"sourceType": "script"
-			}
-		}
+			files: ['.eslintrc.{js,cjs}'],
+			parserOptions: {
+				sourceType: 'script',
+			},
+		},
 	],
-	"parserOptions": {
-		"ecmaVersion": "latest",
-		"sourceType": "module"
+	parserOptions: {
+		ecmaVersion: 'latest',
+		sourceType: 'module',
 	},
-	"rules": {
-		"no-unused-vars": [
-		  "error",
-		  {
-			"varsIgnorePattern": "^_",
-			"argsIgnorePattern": "^_"
-		  }
+	rules: {
+		'no-unused-vars': [
+			'error',
+			{
+				varsIgnorePattern: '^_',
+				argsIgnorePattern: '^_',
+			},
 		],
-		"no-constant-condition": [
-			"error",
+		'no-constant-condition': [
+			'error',
 			{
-				"checkLoops": false
-			}
-		]
-	}
-}
+				checkLoops: false,
+			},
+		],
+	},
+};

.github/workflows/ci.yaml

@@ -1,21 +1,37 @@
 name: CI
 
 on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
+    push:
+        branches: [master]
+    pull_request:
+        branches: [master]
 
 jobs:
-  lint:
-    runs-on: ubuntu-latest
+    lint:
+        runs-on: ubuntu-latest
 
-    steps:
-    - name: Checkout code
-      uses: actions/checkout@v3
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v3
 
-    - name: Install dependencies
-      run: npm ci
+            - name: Install dependencies
+              run: npm ci
 
-    - name: Check types
-      run: npm run lint
+            - name: Check prettier
+              run: npm run check
+
+			- name: Run lint
+              run: npm run lint
+
+	tests:
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v3
+
+            - name: Install dependencies
+              run: npm ci
+
+            - name: Run Test
+              run: npm run test run

.prettierignore

@@ -0,0 +1,2 @@
+/*.md
+/*.json

.prettierrc

@@ -0,0 +1,6 @@
+{
+	"tabWidth": 4,
+	"useTabs": true,
+	"singleQuote": true,
+	"arrowParens": "avoid"
+}