Setup CircleCI for CI workflows

[smoia]

Superseedes #3

Proposed Changes

Change Type

• bugfix (+0.0.1)
• minor (+0.1.0)
• major (+1.0.0)
• refactoring (no version update)
• test (no version update)
• infrastructure (no version update)
• documentation (no version update)
• other

Checklist before review

• I added everything I wanted to add to this PR.
• [Code or tests only] I wrote/updated the necessary docstrings.
• [Code or tests only] I ran and passed tests locally.
• [Documentation only] I built the docs locally.
• My contribution is harmonious with the rest of the code: I'm not introducing repetitions.
• My code respects the adopted style, especially linting conventions.
• The title of this PR is explanatory on its own, enough to be understood as part of a changelog.
• I added or indicated the right labels.

• I added information regarding the timeline of completion for this PR.

• Please, comment on my PR while it's a draft and give me feedback on the development!

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@6e1567c). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 76a3bf2 differs from pull request most recent head c321cef. Consider uploading reports for the commit c321cef to get more accurate results

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