add crowdsec formatter

matrix_webhook/formatters/crowdsec.py

@@ -0,0 +1,11 @@
+def formatter(data, headers):
+    """ format a message sent with crowdsec http endpoints"""
+    data_out = ""
+    for row in data["body"]:
+       if "crowdsecurity" in row['scenario']:
+          source, scenario, *_ = row['scenario'].split('/')
+          row['scenario'] = f"[{scenario}](https://hub.crowdsec.net/author/crowdsecurity/configurations/{scenario})"
+       data_out += f"{row['host']} has been banned {row['duration']} due to {row['scenario']}\n\n[AbuseIPDB](https://www.abuseipdb.com/check{row['host'])" 
+    data["body"] = data_out
+    return data
+