Consider replacing the generator template engine with plop

[joshuayoes]

One of the nice features of Ignite is being able to use EJS to create components via the CLI.

However, the current implementation has a few drawbacks:

• CLI commands cannot accept new props without a release
• The CLI is coupled to existing folders

See plop library for more info https://github.com/plopjs/plop

Pros of moving to plop:

• generator commands live in project and can change with time instead of being tied to boilerplate structure
• The project seems more mature, more features, more docs
• plop seems to have feature parity with ignite generators
• easier to maintain since it is an external library

Cons of moving to plop:

• we do not maintain it, so if we need different things, we can't control the source code
• upfront cost of extra work to implement existing functionality

[joshuayoes]

Originally suggested here #2317 (comment)

[joshuayoes]

Some issues that are prompting this:

• Ignite generators don't work on Windows #2253
• Ignite-cli generate app-icon is not generating icons for ios #2367

Historically, it appears the generator functionality has been the source of 100+ issues, not an insignificant source of maintenance cost: https://github.com/infinitered/ignite/issues?q=is%3Aissue+generate+generator

[frankcalise]

Team met on this topic and will first do a cookbook version for test runs before thinking about incorporating it into Ignite