refactor: Major SDK architecture refactoring and API consolidation

- Consolidate separate buy/sell modules into unified trading interface
- Remove protocol-specific buy/sell files (bonk, pumpfun, pumpswap)
- Add new trading constants and utility functions
- Simplify API with unified buy/sell methods supporting multiple protocols
- Enhance documentation with comprehensive examples and usage guides
- Add balance checking and token account management utilities
- Improve code organization and maintainability

src/swqos/temporal.rs

@@ -4,9 +4,6 @@ use rand::seq::IndexedRandom;
 use reqwest::Client;
 use serde_json::json;
 use std::{sync::Arc, time::Instant};
-
-use solana_sdk::{signature::Signature};
-
 use std::time::Duration;
 use solana_transaction_status::UiTransactionEncoding;