feat: Enhance Solana tools with action-based architecture

- Introduced action system for Solana tools, allowing for better modularity and maintainability.
- Updated SolanaBalanceTool, SolanaTransferTool, SolanaDeployTokenTool, SolanaDeployCollectionTool, SolanaMintNFTTool, SolanaTradeTool, and SolanaRequestFundsTool to utilize action handlers.
- Added new action exports in index.ts for better organization and accessibility.

src/index.ts

@@ -5,3 +5,8 @@ export { SolanaAgentKit, createSolanaTools };
 
 // Optional: Export types that users might need
 export * from "./types";
+
+// Export action system
+export * from "./actions";
+export * from "./types/action";
+export * from "./utils/actionExecutor";