Stabilization tracking issue

[ef4]

TODO list of the high-priority things that will get embroider stabilized and into ember's recommended stack:

• add embroider to default addon blueprint's ember-try config
• glimmer-vm issues to support optimizeable addons, see Dynamic Component Hole Discussion #487
• ship a stable 1.0 of @embroider/macros (and probably rename it to @ember/macros)
  • docs site
  • finish the work on the env-macros branch (this adds support for some things like isTesting and isDevelopingApp macros)
  • make sure the HBS macros are up to date with the JS macros
• create / test / ship the compatibility shim
  • make ember-auto-import aware of v2 addons. It is our key polyfill for v2 behavior in a v1 world.
• complete first version of addon-author-guide
  • have a place for recipes / common issues / etc
  • itemize the different options for authoring format (we expect this to be
    more fluid right now, and move toward standardization after there's real
    feedback)
• figure out the plan for including embroider into ember-cli official releases
  • depends on what the ember-cli team is thinking about their overall architecture
  • we could be a direct dependency of ember-cli, or remain an explicitly imported thing from ember-cli-build.js.