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/doc.go

@@ -0,0 +1,12 @@
+/*
+Package vksdk implements the basic VK API functions.
+
+Source https://github.com/SevereCloud/vksdk
+*/
+package vksdk
+
+// Module constants.
+const (
+	Version = "2.9.0"
+	API     = "5.126"
+)