fix(swap): add --sell-param and --buy-param to order strategy create

Add CLI options and StrategyCreateParams fields for sell_param and
buy_param, which were documented in SKILL.md but missing from the
source. Reuses the existing TradeParam interface.

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

src/client/OpenApiClient.ts

@@ -150,6 +150,8 @@ export interface StrategyCreateParams {
   custom_rpc?: string;
   condition_orders?: StrategyConditionOrder[];
   quote_investment?: string;
+  sell_param?: TradeParam;
+  buy_param?: TradeParam;
 }
 
 export interface StrategyCancelParams {