feat: add reminder source (#126)

packages/freya-source-reminders/src/index.ts

@@ -0,0 +1,11 @@
+export { ReminderSource, type ReminderSourceOptions } from "./reminder-source.ts"
+export {
+	createReminderOccurrenceId,
+	expandReminderOccurrences,
+	expandReminderOriginalDueAts,
+	findReminderOccurrenceIndex,
+	recurrenceAfterSplit,
+	stopRecurrenceAfterOccurrenceCount,
+} from "./recurrence.ts"
+export { renderReminderFeedItem } from "./renderer.tsx"
+export * from "./types.ts"