feat:接入iverilog工具

- 将iverilog可以随着插件的下载而下载
- 用户输入自然语言就可以控制生成对应的VCD文件

src/panels/ICHelperPanel.ts

@@ -41,7 +41,7 @@ export function showICHelperPanel(context: vscode.ExtensionContext) {
     (message) => {
       switch (message.command) {
         case "sendMessage":
-          handleUserMessage(panel, message.text);
+          handleUserMessage(panel, message.text, context.extensionPath);
           break;
         case "readFile":
           handleReadFile(panel, message.filePath);