feat: Add error handling for turtle startup script and improve GPS retry logic

startup_turtle.lua

@@ -34,8 +34,21 @@ if response then
     print("Starting turtle program...")
     sleep(1)
     
-    -- Run the script
-    shell.run(SCRIPT_NAME)
+    -- Run the script with error handling
+    local success, error = pcall(function()
+        shell.run(SCRIPT_NAME)
+    end)
+    
+    if not success then
+        print("")
+        print("========================================")
+        print("  ERROR OCCURRED!")
+        print("========================================")
+        print(error)
+        print("")
+        print("Press any key to see error details...")
+        os.pullEvent("key")
+    end
 else
     print("✗ Download failed!")
     print("Please check:")