feat(addons): hemp plant, wild cherry tree, naturalist-lite

New addons:
- hemp-addon: silverlabs:hemp_crop (5 ages, indoor sun-lamp grown vs
  outdoor sky-lit), shears harvest, cauldron tincture, brownie food,
  bonemeal, sun-lamp redstone-lit block (light_dampening: 0 so crops
  beneath stay lit), grass-seed bootstrap, wandering-trader buyback,
  pillager raid stealing.
- trees-features-addon: ods_orch wild cherry tree — log/leaves/planks/
  stripped/sapling/fruit blocks with seasonal fruit states, structure-
  spawn worldgen.
- naturalist-lite-addon: 13-mob subset of Naturalist (deer, fox, owl,
  skunk, snake, hedgehog, red panda, capybara, elephant, kangaroo,
  moose, tiger, firefly), trimmed for Switch joinability.

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

hemp-addon/hemp_BP/items/hemp_seeds.json

@@ -0,0 +1,29 @@
+{
+  "format_version": "1.21.0",
+  "minecraft:item": {
+    "description": {
+      "identifier": "silverlabs:hemp_seeds",
+      "menu_category": {
+        "category": "nature",
+        "group": "itemGroup.name.seed"
+      }
+    },
+    "components": {
+      "minecraft:icon": "hemp_seeds",
+      "minecraft:max_stack_size": 64,
+      "minecraft:block_placer": {
+        "block": "silverlabs:hemp_crop",
+        "use_on": [
+          "minecraft:dirt",
+          "minecraft:grass_block",
+          "minecraft:farmland",
+          "minecraft:podzol",
+          "minecraft:coarse_dirt",
+          "minecraft:rooted_dirt",
+          "minecraft:moss_block",
+          "minecraft:flower_pot"
+        ]
+      }
+    }
+  }
+}