Provide more user friendly error message.

Author: sebromero

main.js

@@ -96,6 +96,11 @@ ipcMain.handle('install-package', async (event, aPackage, serialPort, compileFil
   } catch (error) {
       let packageDesignator = aPackage.name || aPackage.url;
       console.error(`Failed to install package ${packageDesignator}:`, error);
+      
+      // Check if error contains "Resource busy" and return a more user-friendly message
+      if(error.message.includes('Resource busy')) {
+        return { success: false, error: "Couldn't connect to the board. Close any other program using it and try again." };
+      }
       return { success: false, error: error.message };
   }
 });