Add vk bridge (#1372)

* Add vk bridge

* Vk bridge attachments

* Vk bridge forwarded messages

* Vk bridge sample config and code cleanup

* Vk bridge add vendor

* Vk bridge message edit

* Vk bridge: fix fetching names of other bots

* Vk bridge: code cleanup

* Vk bridge: fix shadows declaration

* Vk bridge: remove UseFileURL

vendor/github.com/SevereCloud/vksdk/v2/object/notifications.go

@@ -0,0 +1,42 @@
+package object // import "github.com/SevereCloud/vksdk/v2/object"
+
+import "encoding/json"
+
+// NotificationsFeedback struct.
+type NotificationsFeedback struct {
+	Attachments []WallWallpostAttachment `json:"attachments"`
+	FromID      int                      `json:"from_id"` // Reply author's ID
+	Geo         BaseGeo                  `json:"geo"`
+	ID          int                      `json:"id"` // Item ID
+	Likes       BaseLikesInfo            `json:"likes"`
+	Text        string                   `json:"text"`  // Reply text
+	ToID        int                      `json:"to_id"` // Wall owner's ID
+}
+
+// NotificationsNotification struct.
+type NotificationsNotification struct {
+	Date     int                `json:"date"` // Date when the event has been occurred
+	Feedback json.RawMessage    `json:"feedback"`
+	Parent   json.RawMessage    `json:"parent"`
+	Reply    NotificationsReply `json:"reply"`
+	Type     string             `json:"type"` // Notification type
+}
+
+// NotificationsNotificationsComment struct.
+type NotificationsNotificationsComment struct {
+	Date    int          `json:"date"`     // Date when the comment has been added in Unixtime
+	ID      int          `json:"id"`       // Comment ID
+	OwnerID int          `json:"owner_id"` // Author ID
+	Photo   PhotosPhoto  `json:"photo"`
+	Post    WallWallpost `json:"post"`
+	Text    string       `json:"text"` // Comment text
+	Topic   BoardTopic   `json:"topic"`
+	Video   VideoVideo   `json:"video"`
+}
+
+// NotificationsReply struct.
+type NotificationsReply struct {
+	Date string `json:"date"` // Date when the reply has been created in Unixtime
+	ID   int    `json:"id"`   // Reply ID
+	Text string `json:"text"` // Reply text
+}