[INTERNAL] Move logic out of `ember-cli` commands

[bertdeblock]

After this, we can easily:

1. Migrate everything else (except ./lib/ember-cli-commands) to .mjs
2. Update all our dependencies to latest because of 1.
3. Introduce our own CLI to use ember-try without ember-cli

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.15%. Comparing base (e0d196e) to head (bda3dce).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1063      +/-   ##
==========================================
- Coverage   95.54%   95.15%   -0.39%     
==========================================
  Files          21       18       -3     
  Lines         516      475      -41     
==========================================
- Hits          493      452      -41     
  Misses         23       23              

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[mansona]

what would it look like to invert this? i.e. make this a type=module package with an index.cjs ? I'm only asking because we're changing most files across to mjs and it seems like that is wanting to be type=module 🤔

[bertdeblock]

I was under the assumption that importing cjs from inside a type=module package was not an option. But I assume this might work by configuring package.json#exports? Would be better indeed.

[mansona]

yes you can configure package.json exports to point at a cjs file for the index 👍

[bertdeblock]

Alright, would be much better indeed. Will update!