chore: clean up

[cfabianski]

Description

Clean up legacy

• moved sql create table rules to its own built_in_rules folder (@markmichon will make the documentation simpler as it was a special snowflake until then)
• remove create view detection (not currently used)
• moved devise patterns into its own file

Checklist

• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.
• I've included usage information in the description if CLI behavior was updated or added.
• PR title follows Conventional Commits format

[elsapet]

@cfabianski Thinking about it, I'm wondering if Devise should stay in the rails/ folder - by their description, they are a Rails (rather than Ruby) solution: https://github.com/heartcombo/devise