feat: add grid level suggestions

src/grid_trading/domain/models.py

@@ -114,6 +114,17 @@ class FeeEstimate:
         return self.commission + self.stamp_tax + self.transfer_fee
 
 
+@dataclass(frozen=True)
+class GridLevelSuggestion:
+    level: int
+    buy_price: Decimal
+    buy_amount: Decimal
+    suggested_quantity: int
+    actual_investment: Decimal
+    sell_price: Decimal
+    estimated_gross_profit: Decimal
+
+
 @dataclass(frozen=True)
 class QuoteSnapshot:
     symbol: str