Add calendar plugins

data/widgets/src/main/java/de/mm20/launcher2/widgets/CalendarWidget.kt

@@ -1,12 +1,7 @@
 package de.mm20.launcher2.widgets
 
-import android.app.Activity
-import android.appwidget.AppWidgetHost
-import android.content.ComponentName
-import android.content.Context
-import android.content.Intent
 import de.mm20.launcher2.database.entities.PartialWidgetEntity
-import de.mm20.launcher2.ktx.tryStartActivity
+import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.encodeToString
 import kotlinx.serialization.json.Json
@@ -15,7 +10,11 @@ import java.util.UUID
 @Serializable
 data class CalendarWidgetConfig(
     val allDayEvents: Boolean = true,
-    val excludedCalendarIds: List<Long> = emptyList(),
+    @Deprecated("Use excludedCalendars instead")
+    @SerialName("excludedCalendarIds")
+    val legacyExcludedCalendarIds: List<Long>? = null,
+    @SerialName("excludedCalendars")
+    val excludedCalendarIds: List<String>? = null,
 )
 data class CalendarWidget(
     override val id: UUID,