ref(repository): Repository sync with the RR2

[rustatian]

Reason for This PR

Repository synchronization with the SpiralScout repositories format

Description of Changes

1. Remove cmd folder.
2. Add CI and codecov to the repository.
3. Fix races in the tests.
4. Properly use of errors.Op.
5. Add PR template.
6. Add dependabot which checks dependencies for the update on a daily basis.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
  - [ ] Any required documentation changes (code and docs) are included in this PR.
  - [ ] Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@cf82328). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #24   +/-   ##
=========================================
  Coverage          ?   64.20%           
=========================================
  Files             ?       17           
  Lines             ?      989           
  Branches          ?        0           
=========================================
  Hits              ?      635           
  Misses            ?      280           
  Partials          ?       74           

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