V2 alpha - initial version (#172)

Initial alpha codebase for version 2 of WireGuard Portal.
This version is considered unstable and incomplete (for example, no public REST API)! 
Use with care!


Fixes/Implements the following issues:
 - OAuth support #154, #1 
 - New Web UI with internationalisation support #98, #107, #89, #62
 - Postgres Support #49 
 - Improved Email handling #47, #119 
 - DNS Search Domain support #46 
 - Bugfixes #94, #48 

---------

Co-authored-by: Fabian Wechselberger <wechselbergerf@hotmail.com>

frontend/src/components/Confirmation.vue

@@ -0,0 +1,54 @@
+<script setup>
+import {ref} from "vue";
+import {useI18n} from "vue-i18n";
+
+const { t } = useI18n()
+
+const title = ref("Default Title")
+const question = ref("Default Question")
+const visible = ref(true)
+
+const emit = defineEmits(['no', 'yes'])
+
+function showDialog(titleStr, questionStr) {
+  visible.value = true
+  title.value = titleStr
+  question.value = questionStr
+}
+
+function yes() {
+  visible.value = false
+  emit('yes')
+}
+
+function no() {
+  visible.value = false
+  emit('no')
+}
+</script>
+
+<template>
+  <Teleport to="#dialogs">
+    <div v-if="visible" class="modal-backdrop fade show">
+      <div class="modal fade show" tabindex="-1">
+        <div class="modal-dialog modal-dialog-scrollable" @click.stop="">
+          <div class="modal-content" ref="body">
+            <div class="modal-header">
+              <h5 class="modal-title">{{ title }}</h5>
+            </div>
+            <div class="modal-body">
+              {{ question }}
+            </div>
+            <div class="modal-footer pt-0 border-top-0">
+              <button type="button" class="btn btn-primary" @click="no">{{ $t('general.no') }}</button>
+              <button type="button" class="btn btn-success" @click="yes">{{ $t('general.yes') }}</button>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  </Teleport>
+</template>
+
+<style>
+</style>