Implement SQLite Store using gorm and relational approach (#1065)

Restructure data handling for improved performance and flexibility. 
Introduce 'G'-prefixed fields to represent Gorm relations, simplifying resource management. 
Eliminate complexity in lookup tables for enhanced query and write speed. 
Enable independent operations on data structures, requiring adjustments in the Store interface and Account Manager.

dns/nameserver.go

@@ -50,19 +50,21 @@ func ToNameServerType(typeString string) NameServerType {
 // NameServerGroup group of nameservers and with group ids
 type NameServerGroup struct {
 	// ID identifier of group
-	ID string
+	ID string `gorm:"primaryKey"`
+	// AccountID is a reference to Account that this object belongs
+	AccountID string `gorm:"index"`
 	// Name group name
 	Name string
 	// Description group description
 	Description string
 	// NameServers list of nameservers
-	NameServers []NameServer
+	NameServers []NameServer `gorm:"serializer:json"`
 	// Groups list of peer group IDs to distribute the nameservers information
-	Groups []string
+	Groups []string `gorm:"serializer:json"`
 	// Primary indicates that the nameserver group is the primary resolver for any dns query
 	Primary bool
 	// Domains indicate the dns query domains to use with this nameserver group
-	Domains []string
+	Domains []string `gorm:"serializer:json"`
 	// Enabled group status
 	Enabled bool
 }