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/api/widgets.go

@@ -0,0 +1,33 @@
+package api // import "github.com/SevereCloud/vksdk/v2/api"
+
+import (
+	"github.com/SevereCloud/vksdk/v2/object"
+)
+
+// WidgetsGetCommentsResponse struct.
+type WidgetsGetCommentsResponse struct {
+	Count int                           `json:"count"`
+	Posts []object.WidgetsWidgetComment `json:"posts"`
+}
+
+// WidgetsGetComments gets a list of comments for the page added through the Comments widget.
+//
+// https://vk.com/dev/widgets.getComments
+func (vk *VK) WidgetsGetComments(params Params) (response WidgetsGetCommentsResponse, err error) {
+	err = vk.RequestUnmarshal("widgets.getComments", &response, params)
+	return
+}
+
+// WidgetsGetPagesResponse struct.
+type WidgetsGetPagesResponse struct {
+	Count int                        `json:"count"`
+	Pages []object.WidgetsWidgetPage `json:"pages"`
+}
+
+// WidgetsGetPages gets a list of application/site pages where the Comments widget or Like widget is installed.
+//
+// https://vk.com/dev/widgets.getPages
+func (vk *VK) WidgetsGetPages(params Params) (response WidgetsGetPagesResponse, err error) {
+	err = vk.RequestUnmarshal("widgets.getPages", &response, params)
+	return
+}