feat: when exporting as markdown, have the current date in the file name

[sharunkumar]

This will enable having an organized view when viewing the files in file explorer/or in any text editor (vscode for example)

[olljanat]

FYI. I just created alternative solutions for this #827

[sharunkumar]

@olljanat are you planning on working on this project further on your fork or just those changes?

[olljanat]

@sharunkumar good question. Preferably of course those changes would be accepted here but if there is no maintenance anymore then I probably might implement some other changes too which I see useful.

[sharunkumar]

@olljanat yeah I wish they worked on this. I already find that slash shortcuts are breaking when opening a new chat without refreshing