Updates to get Eject working with real commands

[tomdye]

Updates to eject command internals.

• dropped scripts support, we don't use them.
• using return of eject rather than providing npm and copy files functions to the eject command.
• only running npm at the end
• copying files to directory named after command name
• added path to copy response to make relative file naming easier
• added eject to command wrapper
• added log output to say which command is being ejected
• removed WARN for commands that don't support eject
• made npm package contents optional
• changed group/name output to group-name to match command filenames
• updated tests

Fixes: #105 #104 #106 #107 Blocks: https://github.com/dojo/cli-build/issues/58

[codecov-io]

Codecov Report

Merging #108 into master will decrease coverage by -0.06%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #108      +/-   ##
==========================================
- Coverage   99.49%   99.43%   -0.06%     
==========================================
  Files          15       15              
  Lines         394      357      -37     
  Branches       49       38      -11     
==========================================
- Hits          392      355      -37     
  Partials        2        2

Impacted Files	Coverage Δ
src/npmInstall.ts	100% <100%> (ø)	:white_check_mark:
src/allCommands.ts	100% <100%> (ø)	:white_check_mark:
src/commands/eject.ts	100% <100%> (ø)	:white_check_mark:
src/command.ts	100% <100%> (ø)	:white_check_mark:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 477e35b...b0adecf. Read the comment docs.

[agubler]

I think we should add all the ejected config inside a root folder such as config similar to create-react-app, otherwise it will clutter the root directory.

[tomdye]

@agubler all checks / coverage passed now