Migrate from ember-cli-mirage to miragejs (#3088)

* chore: 🤖 import explicit mirage references

* chore: 🤖 add mirage setupMirage helper

* chore: 🤖 working example with application adapter test

* chore: 🤖 use internal setupMirage test helper from api addon

* chore: 🤖 conditionally load mirage

* chore: 🤖 filter mirage folder inclusion in production builds

* chore: 🤖 drop ember-mirage and use our own test helpers

* chore: 🤖 collapse reference to import declaration

* docs: ✏️ add comment better explaining the mirage test env

* chore: 🤖 update configuration and manage mirage-related deps

* fix: 🐛 restore ipc mock and add missing checkOS handler

* chore: 🤖 add comment explaining omitting mirage deps in build

* chore: 🤖 allow mirage.enabled to include deps and handlers

* chore: 🤖 re-enable mirage for core dummy app

* Add missing copyright headers

* chore: 🤖 use embroider macros to conditionally start mirage

* docs: ✏️ update api readme for mirage changes

* chore: 🤖 replace remaining ember-cli-mirage references

* chore: 🤖 add mirage to test builds

* fix: 🐛 ensure that auto mirage start doesn't happen in test env

* chore: 🤖 use const instead of var

Co-authored-by: Zhihe Li <zhihe.li@hashicorp.com>

* refactor: 💡 use cleaner logic for excluded api build modules

* fix: 🐛 handle issue where importSync was too eager

This was fixed by bumping the @embroider/macros dependency that includes
a fix to this issue:
https://github.com/embroider-build/embroider/pull/2511

* refactor: 💡 move mirage from addon to app directory

* refactor: 💡 update mirage test helper to be a factory

* chore: 🤖 exclude mirage directory when necessary at build time

* chore: 🤖 add miragejs as admin dev dependency

* refactor: 💡 update reference to startMirage

* chore: 🤖 update local mirage test helper

* chore: 🤖 change import path for mirage on desktop

* chore: 🤖 update imports in tests for startMirage

* chore: 🤖 update startMirage imports for api addon tests

* chore: 🤖 add miragejs dev dep to desktop

* docs: ✏️ update README

* chore: 🤖 set up setupMirage for core tests

* chore: 🤖 fix copyright header

* Add missing copyright headers

---------

Co-authored-by: Zhihe Li <zhihe.li@hashicorp.com>

addons/auth/tests/helpers/index.js

@@ -29,7 +29,6 @@ function setupApplicationTest(hooks, options) {
   // from other addons:
   //
   // setupIntl(hooks, 'en-us'); // ember-intl
-  // setupMirage(hooks); // ember-cli-mirage
 }
 
 function setupRenderingTest(hooks, options) {