ci: remove codecov

[Tohrusky]

Summary by Sourcery

Remove Codecov integration from the CI workflow and update the README to reflect this change by removing the Codecov badge.

CI:

• Remove Codecov integration from the CI workflow.

Documentation:

• Remove Codecov badge from the README file.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR removes Codecov integration from the project by removing the Codecov action from the CI workflow and its corresponding badge from the README.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Remove Codecov integration from CI workflow	Remove Codecov action step from workflow Remove Codecov token secret reference	.github/workflows/CI-test.yml
Remove Codecov badge from project documentation	Remove Codecov coverage status badge	README.md

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[sourcery-ai]

Hey @Tohrusky - I've reviewed your changes - here's some feedback:

Overall Comments:

• Could you share the reasoning behind removing Codecov and whether you have alternative plans for tracking test coverage?

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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