Add option to toggle file paths in error messages

[mm-david]

Sometimes we want to be able to reduce the verbosity of logs, specifically, to not include file names in errors. This PR adds an optional configuration variable to toggle this behaviour (default: the current behaviour, which is to include file names). I've also taken the opportunity to move the growing list of options into their own struct to reduce the number of function arguments and allow for better documentation.

[github-actions]

Modver result

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This PR requires an increase in your module’s major version number.
If the new major version number is 2 or greater,
you must also add or update the version suffix
on the module path defined in your go.mod file.
See the Go Modules Reference for more info.

no new version of package github.com/maxmind/mm-geofeed-verifier/v2/verify
  Major

[WhoIsSethDaniel]

I assume you will perform the release following acceptance of this PR.

[mm-david]

Yes, that's the plan.