res_dir bug and solution

[FCBMSNLOL]

In the "scFEA.py" file, in lines 222 and 324, the specifications for "lossName" and "balanceName" directly use the "output" folder without utilizing the "res_dir" parameter provided by the user. This results in an error when the user specifies an output path other than "output".
FileNotFoundError: [Errno 2] No such file or directory: './output/lossValue_20231124-161348.txt'
The issue can be resolved by changing the content of these two lines to the following:
lossName = "./" + res_dir + "/lossValue_" + timestr + ".txt"
balanceName = "./" + res_dir + "/balance_" + timestr + ".csv"