Add endpoint for skill plans

[TvdW]

Feature Request

Now that skill plans are live, it would be fantastic to be able to create them from ESI.

Use case

The community I fly with has a bunch of skill data in YAML format and we frequently change them, and generating skill plans from those would be good for our community as well as for us! More generally, it will make adoption of skill plans (and occasionally changing them without updating each plan manually) a lot easier.

Authentication

This would require a new scope.

Example return

{
  "status": 200,
  "message": "Skill plan created"
}

Checklist

Check all boxes that apply to this issue:

• [x] Feature request description is provided
• [x] Use case exists
• [x] Feature requires a new route
• [ ] Feature adds data to existing route
• [x] Feature requires new auth scope
• [ ] Feature can reuse existing scope
• [ ] Feature does not require auth
• [ ] Meta feature, applies to all routes

[Blacksmoke16]

Could probably expand this to the usual CRUD stuff, similar to contacts.