task_card added

assets/cards/task_card.json

+{
+    "type": "AdaptiveCard",
+    "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
+    "version": "1.5",
+    "body": [
+        {
+            "type": "Container",
+            "items": [
+                {
+                    "type": "TextBlock",
+                    "wrap": true,
+                    "text": "$header"
+                }
+            ]
+        },
+        {
+            "type": "Container",
+            "items": [
+                {
+                    "type": "ActionSet",
+                    "actions": [
+                        {
+                            "type": "Action.Submit",
+                            "title": "$title",
+                            "data": {
+                                "msteams": {"type": "task/fetch"},
+                                "mx": {
+                                    "type": "$task_type",
+                                    "url": "$task_url"
+                                }
+                            }
+                        }
+                    ]
+                }
+            ]
+        }
+    ]
+}
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