Add settings.yml template generation script

[keigohtr]

What is this PR for?

Add settings.yml template generation script

This PR includes

• Add CLI option to generate settings.yml

What type of PR is it?

Feature

What is the issue?

N/A

How should this be tested?

N/A

[codecov-io]

Codecov Report

Merging #93 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #93   +/-   ##
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  Coverage   83.69%   83.69%           
=======================================
  Files          42       42           
  Lines        2098     2098           
=======================================
  Hits         1756     1756           
  Misses        342      342

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[yuki-mt]

@keigohtr
It seems better to describe rekcurd_dashboard template command in README.md and/or rekcurd_dashboard/README.md

[keigohtr]

@yuki-mt Thank you for your review.
I have updated README.md !

[yuki-mt]

LGTM