Add To Launcher Button for Stereum Servers (#2136)

* ADD: custom url protocol

* ADD: custom url to renderer

* ADD: custom url protocol in vue config

* REFACTOR: custom url protocol

* FIX: add default language

* FIX: linux installation format

* ADD: author email to package.json and vue.config

* FIX: linux build config

* FIX: format

* FIX: prettier format

* ADD: missing menu and check update part

launcher/package.json

@@ -3,7 +3,9 @@
   "version": "2.3.1",
   "private": true,
   "description": "Stereum Ethereum Node Setup Launcher",
-  "author": "stereum.net",
+  "author": {
+    "name": "Stereum Launcher Team"
+  },
   "scripts": {
     "serve": "vue-cli-service serve --port 8081",
     "build": "vue-cli-service build",