Initial implementation of custom price triggers

- likely to have some bugs, but this is good enough for a preview release.

token_bot/persistant_database/alert_schema.py

@@ -99,7 +99,8 @@ class Alert:
 
     def to_human_string(self):
         if self.alert_type == AlertType.SPECIFIC_PRICE:
-            raise NotImplementedError
+            price_gold = self.price
+            return f"Custom Price: {format(price_gold, ',')}g"
         else:
             alert_type_str = " ".join(self.alert_type.name.split("_"))
             return f"{alert_type_str.title()}"

token_bot/persistant_database/alert_type.py

@@ -38,4 +38,7 @@ class AlertType(Enum):
             case "All Time Low":
                 return AlertType.ALL_TIME_LOW
             case _:
+                # Check if it's a custom price format like "Custom Price: 250,000g"
+                if category.startswith("Custom Price"):
+                    return AlertType.SPECIFIC_PRICE
                 return AlertType.SPECIFIC_PRICE