typos improvements

[bmrips]

This PR comprises three changes to the typos hook:

• Use structured configuration by making typos.settings.configuration an attrs. This change is not backwards compatible.
• Add the typos.settings.force-exclude option that maps to typos' --force-exclude argument. In addition, enable it by default since you expect exclude globs set via the --exclude CLI option or the configuration file's [files.extend-exclude] option to be effective.
• Enable multiple exclusion patterns in typos.settings.exclude.