support ordering of triggers by name

[bschrag620]

Fixes #250

What is the purpose of this pull request?

This PR allows for a configurable option to declare how the ordering of the triggers are generated as part of the schema dump.

What changes did you make? (overview)

• added a configurable option for Logdize.order_by_trigger_name that defaults to false
• when set to true, a module is prepended Fx::Adapters::Postgres::Triggers to ensure the returned value is sorted by name

Is there anything you'd like reviewers to focus on?

I'm not sure the best way to test this. I've tested my branch locally against an active project and this is resolving the issue I described.

Checklist

• I've added tests for this change
• I've added a Changelog entry
• I've updated a documentation (Readme)

[palkan]

Thanks for your work!