Add pickaxe ability timer

src/main/kotlin/moe/nea/firmament/events/SlotClickEvent.kt

@@ -0,0 +1,20 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.events
+
+import net.minecraft.item.ItemStack
+import net.minecraft.screen.slot.Slot
+import net.minecraft.screen.slot.SlotActionType
+
+data class SlotClickEvent(
+    val slot: Slot,
+    val stack: ItemStack,
+    val button: Int,
+    val actionType: SlotActionType,
+) : FirmamentEvent() {
+    companion object : FirmamentEventBus<SlotClickEvent>()
+}