Create ISimpleTool interface for all new tools to share

common/src/main/java/com/anthonymendez/items/ISimpleTool.java

@@ -0,0 +1,24 @@
+package com.anthonymendez.items;
+
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipType;
+import net.minecraft.text.Text;
+
+import java.util.List;
+
+public interface ISimpleTool {
+
+  /** Returns this current instance as an {@link ItemStack}. */
+  public ItemStack toItemStack();
+
+  /**
+   * Appends damage and speed to the {@link net.minecraft.item.Item.TooltipContext} of the item.
+   * Stats are shown based on default Minecraft standards.
+   *
+   * <p>TODO(Anthony Mendez): Figure out if we can just pull the default Minecraft mining tool item
+   * tooltip.
+   */
+  public void appendTooltip(
+      ItemStack stack, Item.TooltipContext context, List<Text> tooltip, TooltipType type);
+}