add method doc

Author: alexravenna

src/converter.ts

@@ -1,6 +1,10 @@
 import { getInput, setFailed } from "@actions/core";
 import { exec } from "@actions/exec";
 
+/**
+ * Converts the given VS Code theme to a Visual Studio theme.
+ * @param dir 
+ */
 export async function convertTheme(dir: string): Promise<void> {
     const themeToConvert = getInput("path");