feat: add 1.16.5 protocol support

- Add 1.16.5 minecraft-data
- Add v1_16_5 proto_generated code
- Add OnSuccess1_16_5 handler in client/login.go
- Update proto_generator to include 1.16.5
- Update download_minecraft_data.sh

mc/data/minecraft-data/pc/1.16.1/materials.json

@@ -0,0 +1,69 @@
+{
+  "rock": {
+    "573": 6,
+    "589": 2,
+    "593": 4,
+    "597": 8,
+    "608": 9,
+    "604": 12
+  },
+  "wood": {
+    "574": 6,
+    "590": 2,
+    "594": 4,
+    "598": 8,
+    "609": 9,
+    "605": 12
+  },
+  "plant": {
+    "574": 6,
+    "586": 1.5,
+    "587": 1.5,
+    "590": 2,
+    "591": 1.5,
+    "594": 4,
+    "595": 1.5,
+    "598": 8,
+    "609": 9,
+    "606": 1.5,
+    "602": 1.5,
+    "605": 12
+  },
+  "melon": {
+    "586": 1.5,
+    "587": 1.5,
+    "591": 1.5,
+    "595": 1.5,
+    "606": 1.5,
+    "602": 1.5
+  },
+  "leaves": {
+    "586": 1.5,
+    "587": 1.5,
+    "591": 1.5,
+    "595": 1.5,
+    "602": 1.5,
+    "606": 1.5,
+    "734": 6
+  },
+  "dirt": {
+    "572": 6,
+    "588": 2,
+    "592": 4,
+    "596": 8,
+    "607": 9,
+    "603": 12
+  },
+  "web": {
+    "586": 15,
+    "587": 15,
+    "591": 15,
+    "595": 15,
+    "602": 15,
+    "606": 15,
+    "734": 15
+  },
+  "wool": {
+    "734": 4.8
+  }
+}