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/types/action.ts

@@ -0,0 +1,53 @@
+import { SolanaAgentKit } from "../agent";
+import { z } from "zod";
+
+/**
+ * Example of an action with input and output
+ */
+export interface ActionExample {
+  input: Record<string, any>;
+  output: Record<string, any>;
+  explanation: string;
+}
+
+/**
+ * Handler function type for executing the action
+ */
+export type Handler = (agent: SolanaAgentKit, input: Record<string, any>) => Promise<Record<string, any>>;
+
+/**
+ * Main Action interface inspired by ELIZA
+ * This interface makes it easier to implement actions across different frameworks
+ */
+export interface Action {
+  /**
+   * Unique name of the action
+   */
+  name: string;
+
+  /**
+   * Alternative names/phrases that can trigger this action
+   */
+  similes: string[];
+
+  /**
+   * Detailed description of what the action does
+   */
+  description: string;
+
+  /**
+   * Array of example inputs and outputs for the action
+   * Each inner array represents a group of related examples
+   */
+  examples: ActionExample[][];
+
+  /**
+   * Zod schema for input validation
+   */
+  schema: z.ZodType<any>;
+
+  /**
+   * Function that executes the action
+   */
+  handler: Handler;
+}