[MM-21123] Add Labels to upstream Marketplace response (#13425)

* Add Labels to upstream Marketplace response

* Add LOCAL label to local plugins

model/marketplace_plugin.go

@@ -14,18 +14,26 @@ import (
 	"github.com/pkg/errors"
 )
 
-// BaseMarketplacePlugin is a Mattermost plugin received from the marketplace server.
+// BaseMarketplacePlugin is a Mattermost plugin received from the Marketplace server.
 type BaseMarketplacePlugin struct {
-	HomepageURL     string `json:"homepage_url"`
-	IconData        string `json:"icon_data"`
-	DownloadURL     string `json:"download_url"`
-	ReleaseNotesURL string `json:"release_notes_url"`
-	// Signature represents a signature of a plugin saved in base64 encoding.
-	Signature string    `json:"signature"`
-	Manifest  *Manifest `json:"manifest"`
+	HomepageURL     string             `json:"homepage_url"`
+	IconData        string             `json:"icon_data"`
+	DownloadURL     string             `json:"download_url"`
+	ReleaseNotesURL string             `json:"release_notes_url"`
+	Labels          []MarketplaceLabel `json:"labels"`
+	Signature       string             `json:"signature"` // Signature represents a signature of a plugin saved in base64 encoding.
+	Manifest        *Manifest          `json:"manifest"`
 }
 
-// MarketplacePlugin is a state aware marketplace plugin.
+// MarketplaceLabel represents a label shown in the Marketplace UI.
+type MarketplaceLabel struct {
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	URL         string `json:"url"`
+	Color       string `json:"color"`
+}
+
+// MarketplacePlugin is a state aware Marketplace plugin.
 type MarketplacePlugin struct {
 	*BaseMarketplacePlugin
 	InstalledVersion string `json:"installed_version"`