Added agent's custom fields to table result

This action is to enable search and summary in the dashboard view.

api/tacticalrmm/agents/serializers.py

@@ -95,6 +95,7 @@ class AgentTableSerializer(serializers.ModelSerializer):
     local_ips = serializers.ReadOnlyField()
     make_model = serializers.ReadOnlyField()
     physical_disks = serializers.ReadOnlyField()
+    custom_fields = AgentCustomFieldSerializer(many=True, read_only=True)
 
     def get_alert_template(self, obj):
         if not obj.alert_template:
@@ -153,6 +154,7 @@ class AgentTableSerializer(serializers.ModelSerializer):
             "local_ips",
             "make_model",
             "physical_disks",
+            "custom_fields",
         ]
         depth = 2