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/blocks/tent_canvas.json

@@ -0,0 +1,24 @@
+{
+  "format_version": "1.21.0",
+  "minecraft:block": {
+    "description": {
+      "identifier": "silverlabs:tent_canvas"
+    },
+    "components": {
+      "minecraft:destructible_by_mining": {
+        "seconds_to_destroy": 0.4
+      },
+      "minecraft:destructible_by_explosion": {
+        "explosion_resistance": 1.0
+      },
+      "minecraft:map_color": "#547A4E",
+      "minecraft:material_instances": {
+        "*": {
+          "texture": "tent_canvas",
+          "render_method": "alpha_test"
+        }
+      },
+      "minecraft:light_dampening": 1
+    }
+  }
+}