Add Legacy-style Book Binder

src/main/resources/data/rivencraft/loot_table/blocks/book_binder.json

@@ -0,0 +1,4 @@
+{
+  "type": "minecraft:block",
+  "pools": [{"rolls":1,"entries":[{"type":"minecraft:item","name":"rivencraft:book_binder"}]}]
+}

src/main/resources/data/rivencraft/recipe/book_binder.json

@@ -0,0 +1,10 @@
+{
+  "type": "minecraft:crafting_shaped",
+  "category": "misc",
+  "pattern": ["III", "PPP", "P P"],
+  "key": {
+    "I": {"item":"minecraft:iron_ingot"},
+    "P": {"tag":"minecraft:planks"}
+  },
+  "result": {"id":"rivencraft:book_binder","count":1}
+}