Added trading and quests, checkpoint push

gamedata/static_npcs.json

@@ -0,0 +1,93 @@
+{
+    "static_npcs": {
+        "trader_joe": {
+            "npc_id": "trader_joe",
+            "name": {
+                "en": "Trader Joe",
+                "es": "Comerciante José"
+            },
+            "location_id": "residential",
+            "image": "images/static_npcs/trader_joe.webp",
+            "dialog": {
+                "greeting": {
+                    "en": "Got some rare goods for sale, stranger.",
+                    "es": "Tengo mercancía rara a la venta, forastero."
+                },
+                "topics": [
+                    {
+                        "id": "lore_markets",
+                        "title": {
+                            "en": "About the markets",
+                            "es": "Sobre los mercados"
+                        },
+                        "text": {
+                            "en": "Before the fall, this place was bustling. Now, we scrape by with what we can found.",
+                            "es": "Antes de la caída, este lugar estaba lleno de vida. Ahora, sobrevivimos con lo que podemos encontrar."
+                        }
+                    }
+                ],
+                "quest_offer": {
+                    "en": "I could use a hand with something.",
+                    "es": "Podría necesitar una mano con algo."
+                }
+            },
+            "trade": {
+                "enabled": true,
+                "currency": "value",
+                "unlimited_currency": true,
+                "keep_sold_items": true,
+                "buy_markup": 1.5,
+                "sell_markdown": 0.5,
+                "stock": [
+                    {
+                        "item_id": "water_bottle",
+                        "max_stock": 10,
+                        "restock_rate": 2,
+                        "infinite": false
+                    },
+                    {
+                        "item_id": "canned_food",
+                        "max_stock": 50,
+                        "infinite": true
+                    }
+                ]
+            }
+        },
+        "mechanic_mike": {
+            "npc_id": "mechanic_mike",
+            "name": {
+                "en": "Mechanic Mike",
+                "es": "Mecánico Mike"
+            },
+            "location_id": "gas_station",
+            "image": "images/static_npcs/mechanic_mike.webp",
+            "dialog": {
+                "greeting": {
+                    "en": "If it's broken, I might be able to fix it. Might.",
+                    "es": "Si está roto, tal vez pueda arreglarlo. Tal vez."
+                },
+                "topics": [],
+                "quest_offer": {
+                    "en": "Need parts. Always need parts.",
+                    "es": "Necesito piezas. Siempre necesito piezas."
+                }
+            },
+            "trade": {
+                "enabled": true,
+                "currency": "value",
+                "unlimited_currency": true,
+                "keep_sold_items": false,
+                "buy_markup": 1.2,
+                "sell_markdown": 0.6,
+                "stock": [
+                    {
+                        "item_id": "scrap_metal",
+                        "max_stock": 20,
+                        "refresh_rate": 5,
+                        "infinite": false
+                    }
+                ]
+            }
+        }
+    }
+}