initial commit

- add .gitignore
  - node modules
  - generated js files
- add prettier and eslint configurations
  - prettier: some options configured
  - eslint: js linting disabled
- initialize npm, install packages
- add vscode settings
  - prettier formatting on save disabled

.vscode/settings.json

@@ -0,0 +1,13 @@
+{
+	// "editor.formatOnSave": true,
+	"editor.codeActionsOnSave": {
+		"source.fixAll.eslint": "explicit"
+	},
+	"prettier.requireConfig": true,
+	"[typescript]": {
+		"editor.defaultFormatter": "esbenp.prettier-vscode"
+	},
+    "editor.rulers": [
+        120
+    ],
+}