Add ConnectionCount and DriverTitle for monitoring commands

Author: GromNaN

src/Connection.php

@@ -361,4 +361,9 @@ private static function lookupVersion(): string
             return self::$version = 'error';
         }
     }
+
+    public function getDriverTitle()
+    {
+        return 'MongoDB';
+    }
 }

src/Schema/Builder.php

@@ -289,4 +289,14 @@ protected function getAllCollections()
 
         return $collections;
     }
+
+    public function getConnectionsCount()
+    {
+        $status = $this->connection
+            ->getMongoDB()
+            ->command(['serverStatus' => 1])
+            ->toArray();
+
+        return $status[0]['connections']['current'];
+    }
 }