feat(inventory): hotbar + inventory UI + 5 crafting recipes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/inventory/CraftingRecipes.gd

@@ -0,0 +1,50 @@
+class_name CraftingRecipes
+extends RefCounted
+
+static var RECIPES: Array = [
+	{
+		"name": "Lampe bioluminescente",
+		"inputs": [{"item_id": 5, "count": 2}, {"item_id": 6, "count": 1}],
+		"output": {"item_id": 100, "count": 1}
+	},
+	{
+		"name": "Harpon",
+		"inputs": [{"item_id": 3, "count": 2}, {"item_id": 7, "count": 2}],
+		"output": {"item_id": 101, "count": 1}
+	},
+	{
+		"name": "Bulle d'air",
+		"inputs": [{"item_id": 6, "count": 3}, {"item_id": 8, "count": 1}],
+		"output": {"item_id": 102, "count": 1}
+	},
+	{
+		"name": "Algue cuisinee",
+		"inputs": [{"item_id": 6, "count": 2}],
+		"output": {"item_id": 103, "count": 2}
+	},
+	{
+		"name": "Armure ecailles",
+		"inputs": [{"item_id": 4, "count": 4}, {"item_id": 7, "count": 2}],
+		"output": {"item_id": 104, "count": 1}
+	},
+]
+
+
+static func find_available_recipes(inventory: Inventory) -> Array:
+	var available: Array = []
+	for i: int in range(RECIPES.size()):
+		if inventory.has_items(RECIPES[i]["inputs"]):
+			available.append(i)
+	return available
+
+
+static func craft(inventory: Inventory, recipe_index: int) -> bool:
+	if recipe_index < 0 or recipe_index >= RECIPES.size():
+		return false
+	var recipe: Dictionary = RECIPES[recipe_index]
+	if not inventory.consume_items(recipe["inputs"]):
+		return false
+	var leftover: int = inventory.add_item(recipe["output"]["item_id"], recipe["output"]["count"])
+	if leftover > 0:
+		push_warning("CraftingRecipes: craft overflow — %d items lost" % leftover)
+	return true