Make a start on adding subscriptions

agenda/subscription.py

@@ -0,0 +1,25 @@
+"""Subscriptions."""
+
+import yaml
+
+from .types import Event
+
+
+def get_events(filepath: str) -> list[Event]:
+    """Get subscription renewal dates."""
+    events = []
+    with open(filepath) as f:
+        items = yaml.safe_load(f)
+
+    for item in items:
+        if "renewal_date" not in item:
+            continue
+        events.append(
+            Event(
+                date=item["renewal_date"],
+                name="subscription",
+                title=item["name"] + " renewal",
+            )
+        )
+
+    return events