Scully: Better description of how to include a written plugin

[d-koppenhagen]

🗄️ Docs report

Description

Currently in the docs it is described how a plugin (e.g. Router Plugin) is build:
https://github.com/scullyio/scully/blob/master/docs/plugins.md

I couldn't find any hint of where to put the plugin file should be put ideally and from where registerPlugin plugin is called.

🔬 Minimal Reproduction

What's the affected URL?**

https://github.com/scullyio/scully/blob/master/docs/plugins.md

Expected vs Actual Behavior**

The docs should include:

• [ ] The import of registerPlugin (I think it comes from @scullyio/scully doesn't it?
• [ ] Where to put the plugin configuration file? Is there a naming convention for this file? Is it a *.js or *.ts file? Or is it may just part of scully.config.js?
• [ ] How will scully find this plugin? Is there a configuration flag which links to the file(s)?

Best regards,
Danny

[aaronfrost]

I agree. We need to nail this down. You are right. We are locking down the plugins right now, and this is about to get better.

[Villanuevand]

@d-koppenhagen We just add more information about registerPlugin in plugins.md