Conference CFP end dates as events

Closes: #122

agenda/conference.py

@@ -48,8 +48,9 @@ class Conference:
 
 def get_list(filepath: str) -> list[Event]:
     """Read conferences from a YAML file and return a list of Event objects."""
-    return [
-        Event(
+    events: list[Event] = []
+    for conf in (Conference(**conf) for conf in yaml.safe_load(open(filepath, "r"))):
+        event = Event(
             name="conference",
             date=conf.start,
             end_date=conf.end,
@@ -57,5 +58,15 @@ def get_list(filepath: str) -> list[Event]:
             url=conf.url,
             going=conf.going,
         )
-        for conf in (Conference(**conf) for conf in yaml.safe_load(open(filepath, "r")))
-    ]
+        events.append(event)
+        if not conf.cfp_end:
+            continue
+        cfp_end_event = Event(
+            name="cfp_end",
+            date=conf.cfp_end,
+            title="CFP end: " + conf.display_name,
+            url=conf.cfp_url or conf.url,
+        )
+        events.append(cfp_end_event)
+
+    return events