Support globbing in ics_{task,event}_files

[LnLcFlx]

I have a folder folder with each subfolder subfolder1, subfolder2,... representing one calendar and each subfolder containing the events as separate ics files.

Right now I have to do

ics_task_files = calendars/subfolder1,calendars/subfolder2,...

but it would be super useful if a glob patterns such as

ics_task_files = calendars/*

would expand to the above syntax.
This is especially the case if you have many calendars or the calendars/subfolders change very often on disk.

[anufrievroman]

I think it's quite possible to make it.

Note to myself (or whoever would like to work on it): it can be implemented like that: in loaders.py around line 307, there should be a check for * and then if true, the os.walk should also walk through all directories in that path or something like that.

[LnLcFlx]

I was thinking of python standard library glob