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_RP/textures/item_texture.json

@@ -0,0 +1,12 @@
+{
+  "resource_pack_name": "camping_supplies_RP",
+  "texture_name": "atlas.items",
+  "texture_data": {
+    "tent_item": {
+      "textures": "textures/items/tent"
+    },
+    "hammock_item": {
+      "textures": "textures/items/hammock"
+    }
+  }
+}