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/domain/base.go

@@ -0,0 +1,37 @@
+package domain
+
+import (
+	"time"
+)
+
+type BaseModel struct {
+	CreatedBy string
+	UpdatedBy string
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
+
+type PrivateString string
+
+func (PrivateString) MarshalJSON() ([]byte, error) {
+	return []byte(`""`), nil
+}
+
+func (PrivateString) String() string {
+	return ""
+}
+
+const (
+	DisabledReasonExpired          = "expired"
+	DisabledReasonDeleted          = "deleted"
+	DisabledReasonUserEdit         = "user edit action"
+	DisabledReasonUserCreate       = "user create action"
+	DisabledReasonAdminEdit        = "admin edit action"
+	DisabledReasonAdminCreate      = "admin create action"
+	DisabledReasonApiEdit          = "api edit action"
+	DisabledReasonApiCreate        = "api create action"
+	DisabledReasonLdapMissing      = "missing in ldap"
+	DisabledReasonUserMissing      = "missing user"
+	DisabledReasonMigrationDummy   = "migration dummy user"
+	DisabledReasonInterfaceMissing = "missing WireGuard interface"
+)