AutoBackup

Automaticly copy database before bot starts
to folder backup with filename sogebot.db_timestamp

I don’t really like autobackup but we can probably just copy db before migration and keep if if fails and delete it if succeeds

but that would work only for sqlite, not others dbs.

because sqlite is default and just copy yes no special “backup” function
and delete on success should be optional

startup.bat and startup.sh can do this