Move AUTO_NTFY_DONE_IGNORE config to the yaml file

This could be an easy way to enable better parametric filtering of commands + subcommands.

For example I might not want to have a notification for git commit (because git commit might take more than 10 s while im editing using my editor) but I still want to time git pull in case im working with a huge repo

This could look something like

```yaml
backends:
# ...
auto_ignore_cmds:
- git:
- commit
- chezmoi:
- edit
```