Add skip-rosdep-install & rosdep-check options

[kaichie]

Closes #829

This PR adds an optional argument for skipping rosdep install in the action (skip-rosdep-install) and an optional argument to run rosdep check (rosdep-check), which only works if skip-rosdep-install is also enabled.

[christophebedard]

Could you just sign-off your commit? git commit --amend --no-edit -s and then force push.

[codecov]

Codecov Report

Attention: 14 lines in your changes are missing coverage. Please review.

Comparison is base (bc41bd3) 47.53% compared to head (63520d1) 45.81%.

Files	Patch %	Lines
src/action-ros-ci.ts	12.50%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #830      +/-   ##
==========================================
- Coverage   47.53%   45.81%   -1.72%     
==========================================
  Files           2        2              
  Lines         284      299      +15     
  Branches       77       80       +3     
==========================================
+ Hits          135      137       +2     
- Misses        149      162      +13     

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[christophebedard]

So sorry for the long delay!

I have a suggestion and some requests:

1. Can you add a new section in the README to document the skip-rosdep-install and rosdep-check options? Like the sections here: https://github.com/ros-tooling/action-ros-ci#Usage. You could add a single section for both options, since they're tightly connected. It would be good to explicitly mention why users might want to use these options, e.g., to fail if dependencies are not properly declared.
2. If possible, a simple test that uses these 2 options (and doesn't fail) would be good.

Also, please rebase on master.

[roncapat]

@kaichie may I help advance this PR somehow? I'm not good in writing tests in this context, but I may help with the docs for example.

[kaichie]

@christophebedard Added the suggestions and requested changes, let me know if I missed anything. Thanks for checking!

@roncapat Appreciate your offer to assist! I have updated the test and the docs. However, feel free to make any adjustment to the docs if you think it's appropriate. 😃

[roncapat]

@christophebedard friendly ping :)

[christophebedard]

A few more suggestions! Then this should be ready.

[christophebedard]

Thanks for the contribution!

[christophebedard]

I released this as 0.3.6/v0.3 https://github.com/ros-tooling/action-ros-ci/releases/tag/0.3.6