Refactor/adjust config test codecov

[rsaz]

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• The commit message follows our guidelines:
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• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Please describe the current behavior that you are modifying, or link to a relevant issue.
No code coverage configuration. No vitest configuration added. Readme without all badges
Issue Number: N/A

What is the new behavior?

Describe the new behavior or link to a relevant issue.

• Codecov setup
• Vitest setup
• Readme with all badges, standardized with the @core package

Does this PR introduce a breaking change?

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications below.

Other information

Any other information that is important to this PR.

[codecov]

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