Setup adding/removing multiple timers

app/src/main/kotlin/com/simplemobiletools/clock/models/Timer.kt

@@ -0,0 +1,16 @@
+package com.simplemobiletools.clock.models
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "timers")
+data class Timer(
+    @PrimaryKey(autoGenerate = true) val id: Long?,
+    val seconds: Int,
+    val state: TimerState,
+    val vibrate: Boolean,
+    val soundUri: String,
+    val soundTitle: String,
+    val label: String,
+    val maxReminderSecs: String,
+)