Read birthdays from YAML

Closes: #22

agenda/__init__.py

@@ -305,16 +305,20 @@ def next_birthday(from_date: date, birth_date: date) -> tuple[date, int]:
 
 def get_birthdays(from_date: date, config: configparser.ConfigParser) -> list[Event]:
     """Get birthdays from config."""
-    if "birthdays" not in config:
-        return []
+    filename = config["data"]["entities"]
+
     events = []
-    for name, date_str in config["birthdays"].items():
-        bday = next_birthday(from_date, datetime.strptime(date_str, "%Y-%m-%d").date())
+    with open(filename) as f:
+        entities = yaml.safe_load(f)
+
+    for entity in entities:
+        birthday = date(**entity["birthday"])
+        bday, age = next_birthday(from_date, birthday)
         events.append(
             Event(
-                date=bday[0],
+                date=bday,
                 name="birthday",
-                title=f"{name.title()} (aged {bday[1]})",
+                title=f'{entity["label"]} (aged {age})',
             )
         )