feat(market): add market signal command for token signal feed

- Add POST /v1/market/token_signal client method and TokenSignalGroup interface
- Add market signal sub-command with individual flags for single-group queries
- Support --groups <json> override for multi-group parallel queries
- Document max 50 results per group limit
- Update SKILL.md, cli-usage.md, and README with signal types, response fields, and examples

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

src/client/OpenApiClient.ts

@@ -156,6 +156,18 @@ export interface StrategyCancelParams {
   close_sell_model?: string;
 }
 
+export interface TokenSignalGroup {
+  signal_type?: number[];
+  mc_min?: number;
+  mc_max?: number;
+  trigger_mc_min?: number;
+  trigger_mc_max?: number;
+  total_fee_min?: number;
+  total_fee_max?: number;
+  min_create_or_open_ts?: string;
+  max_create_or_open_ts?: string;
+}
+
 export interface CreateTokenParams {
   chain: string;
   dex: string;
@@ -284,6 +296,10 @@ export class OpenApiClient {
     return this.normalRequest("GET", "/v1/market/rank", { chain, interval, ...extra });
   }
 
+  async getTokenSignalV2(chain: string, groups: TokenSignalGroup[]): Promise<unknown> {
+    return this.normalRequest("POST", "/v1/market/token_signal", {}, { chain, groups });
+  }
+
   // ---- User endpoints (normal auth) ----
 
   async getUserInfo(): Promise<unknown> {