build: electron-webpack replacement (#130)

* some changes

* improvements and dedicated webpeck configs for render and main

* added debugging setup

* vscode main process debug config

* vue3 devtools

src/renderer/index.js

@@ -0,0 +1,19 @@
+'use strict';
+
+import Vue from 'vue';
+
+import '@mdi/font/css/materialdesignicons.css';
+import '@/scss/main.scss';
+
+import App from '@/App.vue';
+import store from '@/store';
+import i18n from '@/i18n';
+
+i18n.locale = store.state.settings.locale;
+Vue.config.productionTip = false;
+
+new Vue({
+   render: h => h(App),
+   store,
+   i18n
+}).$mount('#app');