feat(camping): add craftable tent and hammock addon

Tent pitches over a 2x3 flat footprint and lets players skip to dawn
without touching their spawn point. Hammock strings between two posts
3-6 blocks apart (straight or diagonal, +/-1 block height) and keeps
hostile mobs at bay while occupied. Both are craftable (wool/sticks and
wool/string) and mounted in all four worlds.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

camping-supplies-addon/camping_supplies_BP/items/tent.json

@@ -0,0 +1,19 @@
+{
+  "format_version": "1.21.0",
+  "minecraft:item": {
+    "description": {
+      "identifier": "silverlabs:tent",
+      "menu_category": {
+        "category": "equipment",
+        "group": "itemGroup.name.miscellaneous"
+      }
+    },
+    "components": {
+      "minecraft:max_stack_size": 16,
+      "minecraft:icon": {
+        "texture": "tent_item"
+      },
+      "minecraft:hand_equipped": true
+    }
+  }
+}