initial implementation of plugin

[lorandszakacs]

Shamelessly inspired from sbt-http4s-org

• includes CirceOrgPlugin whiich can be used to bring in some common settings amongst projects. Requires you define circeRootOfCodeCoverage to either None for no code coverage, or Some("name-of-root-project")
• includes CirceOrgSitePlugin which is an attempt at providing a common themse for a gh-pages website. It's currently looking much worse than the original because I'm bad at this. See screenshot in discord channel.

Draft description here for historical reasons:
⚠️ Draft PR, description under heavy edit

Shamelessly inspired from sbt-http4s-org

• as of now uses only sbt-typelevel-ci and sbt-typelevel-settings. We could also include -site in this PR, but that might put too much of an early adoption burden on existing projects?
• adds scalastyle-sbt-plugin and adds sbt-scoverage with settings that seem to be consistent across existing projects
• remove scalastyle-sbt-plugin, replace with a combo of scalafmt and sbt-typelevel-scalafix

TODO:

• include CirceIoSitePlugin
  • align theme (colors, style, etc) with what we have in the current circe microsite
• look for other common settings among projects
• actually test this plugin 🙈

[armanbilge]

We could also include -site in this PR, but that might put too much of an early adoption burden on existing projects?

I recommend you include it as a CirceSitePlugin, as done in sbt-http4s-org. It is 100% opt-in (indeed, may http4s repos are not yet using it). The advantage of getting this down early is it lets style/design propagate from one source.

But it's not really a burden to setup: couple lines of sbt and an index.md that shows the project coordinates with the latest version are already helpful.

[lorandszakacs]

It is 100% opt-in

A, correct. I knew that, but it somehow didn't register :D will include site plugin as well then

[armanbilge]

In the longterm I think it's best to get onto sbt-typelevel proper (instead of the ci-release+settings combo). The only new thing it adds is license headers (which can be made to go away if they are truly that awful).

[armanbilge]

Make sure to run githubWorkflowGenerate :)

[zarthross]

Looks fine to me... @armanbilge ?

[armanbilge]

One final pass of comments :)

[armanbilge]

Thanks for all your work on this!

[zmccoy]

This is fantastic, thank you so much :)