Reviving NanocPlugin

[ASRagab]

Fixes

• Revive Nanoc support #205

Additional Changes

• I added a minimal .scalafmt.conf and plugin, I wanted to have a consistent formatting experience, also I updated the build process to also build for java 17. (can undo these changes, if they are not copacetic)

[lightbend-cla-validator]

Hi @ASRagab,

Thank you for your contribution! We really value the time you've taken to put this together.

We see that you have signed the Lightbend Contributors License Agreement before, however, the CLA has changed since you last signed it.
Please review the new CLA and sign it before we proceed with reviewing this pull request:

https://www.lightbend.com/contribute/cla

[ASRagab]

I have signed the updated CLA.

[ennru]

The reformatting made this PR look so much bigger. That's why I postponed looking closely for so long...

LGTM.

[ennru]

Nanoc doesn't work properly in CI:
https://github.com/sbt/sbt-site/actions/runs/7917374088/job/21613302634?pr=212#step:7:119

[ASRagab]

Oh no, I'll take a look.

Nanoc doesn't work properly in CI: https://github.com/sbt/sbt-site/actions/runs/7917374088/job/21613302634?pr=212#step:7:119