Add AppVersion to pkg/version (#3412)

Signed-off-by: Kaelan Patel <kaelanspatel@gmail.com>

core/pkg/version/version.go

@@ -3,8 +3,9 @@ package version
 import "fmt"
 
 var (
-	Version   = "dev"
-	GitCommit = "HEAD"
+	Version    = "dev"
+	GitCommit  = "HEAD"
+	AppVersion = "unknown"
 )
 
 func FriendlyVersion() string {