✨ add Resources wiki page

Resources.md

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+# Resources
+
+> **Legend**
+> - ✅ Implemented — exists in the current codebase
+> - 🗺️ Planned — design exists but not yet implemented
+
+---
+
+## Raw Resources
+
+| Resource | Source | Harvested by | Yield |
+|----------|--------|--------------|-------|
+| `wood` ✅ | Tree node (FOREST tile) | Villager (chop) | +2 per harvest |
+| `stone` ✅ | Rock node (ROCK tile) | Villager (mine) | +2 per harvest |
+| `wheat` ✅ | Wheat crop (max stage) | Villager (farm) or Player | +3 per harvest |
+| `carrot` ✅ | Carrot crop (max stage) | Villager (farm) or Player | +4 per harvest |
+| `wheat_seed` ✅ | Wheat harvest | — | +2 per harvest |
+| `carrot_seed` ✅ | Carrot harvest | — | +1 per harvest |
+| `tree_seed` ✅ | Starting stockpile | — | Used to plant tree seedlings |
+
+## Starting Stockpile ✅
+
+```
+wood: 10 · stone: 5 · wheat_seed: 10 · carrot_seed: 5 · tree_seed: 5
+```
+
+## Resource Nodes
+
+| Kind | Spawn tile | Spawn chance | HP | Yield per harvest |
+|------|------------|--------------|-----|-------------------|
+| Tree | FOREST | 70% | 3 | +2 wood |
+| Rock | ROCK | 50% | 5 | +2 stone |
+
+HP is reduced by 1 per villager harvest. When HP reaches 0 the node is removed and the tile changes to DARK_GRASS (trees) or stays ROCK (rocks).
+
+---
+
+← [[Game Systems Reference]]