Add 'like' extension to Option[String]

[guersam]

Supersedes #2039

Problem

1. In large databases, string partial match on nullable strings are not uncommon. It would be more ergonomic to write field like "%abc%" than field.exists(_ like "%abc%").
2. Furthermore, "like" extension sometimes causes syntax error In SQL Server as reported in Fix like to be used as condition to generate valid sql #2039

Solution

• Add LikeOption(s1: Option[String]) extension similar to Like.
• Make "like" expression a condition instead of a boolean

Checklist

• Unit test all changes
• Update README.md if applicable
• Add [WIP] to the pull request title if it's work in progress
• Squash commits that aren't meaningful changes
• Run sbt scalariformFormat test:scalariformFormat to make sure that the source files are formatted

@getquill/maintainers

[guersam]

Rebased onto the current master.

[deusaquilus]

@guersam So #2039 looks totally right but I'm not sure about this. Can you do field.getOrNull like "%abc%". We also support that.

[guersam]

I'd like to avoid it because there are too many of them in my usecase, but I can bake the extension into my custom context anyway.