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>

internal/app/api/v0/model/models.go

@@ -0,0 +1,12 @@
+package model
+
+type Error struct {
+	Code    int    `json:"Code"`
+	Message string `json:"Message"`
+}
+
+type Settings struct {
+	MailLinkOnly              bool `json:"MailLinkOnly"`
+	PersistentConfigSupported bool `json:"PersistentConfigSupported"`
+	SelfProvisioning          bool `json:"SelfProvisioning"`
+}