Improved automatic framework support in `ntl build`

[ascorbic]

Which problem is this feature request solving?

Currently running ntl dev in an unliked project has a good experience: it detects the framework and runs the correct command. However this is not true for ntl build. First, it won't allow the site to build without --offline, and it doesn't do framework build command detection or build plugin installation. This means it's not possible to build a site without either creating a toml or linking the site. This adds friction for users trying out builds.

Describe the solution you'd like

ntl build should behave like ntl dev. It should run even if the site is unlinked, and it should use framework-info to detect settings - including auto-installing plugins.

Pull request (optional)

• I can submit a pull request.

[eduardoboucas]

@ascorbic I believe this can be closed now?

[ascorbic]

No, this still won't work, but it's less critical now that dev handles plugins. One for later. What I want is the ntl build experience to be just as good!