fix(ratings): Fix number of stars shown in VitaminRatings composables

[olivierperez]

Changes description 🧑‍💻

First I wrote some tests to be sure I'm fixing something.
Then I fixed the algorithm deciding if a star should be Empty, Half or Fill.

Context 🤔

Closes #175

Checklist ✅

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• I have reviewed the submitted code.
• I have tested on a phone device/emulator.
• I have tested on a tablet device/emulator.
• I have tested on a large screen device/emulator.
• If it includes design changes, please ask for a review design-system-core-team-design GitHub team.

Screenshots 📸

Fixed ratings of 3.0, 3.1, ..., 3.9, 4.0

Other info 👋

This fix completes another merged fix about whole numbers.

[CLAassistant]

All committers have signed the CLA.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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[dktbitrise]

You can download the apk here :

sample-debug.apk :
https://app.bitrise.io/app/e9ae480151be4514/build/7a97af04-dde1-499f-b4f0-2dde6f7730d9/artifact/fa2f1274eeb9c467/p/bc5f9f4b6e402b912779d1ca512d35b1