fix: Material update

[jonas-martinez]

About this PR

This PR is about the Flutter Material update from 2 to 3. It changed some widgets style so we need to change that so that they correspond to the design on Figma.
In this PR I mainly fixed the button which had a too much rounded border following the update of Material. I also found that the Switch widget changed a lot but it is closer to our design so this is good for us. We might need to adapt the thumb size to match our design. I opened another issue for the Switch.

Technical highlight/advice

How to test my changes

Checklist

• I didn't over-scope my PR
• My PR title matches the commit convention
• I did not include breaking changes
• I made my own code-review before requesting one

I included unit tests that cover my changes

• 👍 yes
• 🙅 no, because they aren't needed
• 🙋 no, because I need help

I added/updated the documentation about my changes

• 📜 README.md
• 📕 docs/*.md
• 📓 docs.lenra.io
• 🙅 no documentation needed

[jonas-martinez]

I still need to find out why the LenraTable component size has changed since Material was updated. It is 6 pixels too big in height.

[jonas-martinez]

The Switch widget also changed in Material 3.
It seems hard to adapt it so we might need to create a custom widget.
https://blog.logrocket.com/advanced-guide-flutter-switches-toggles/#creating-a-custom-animated-switch-button

This image is the expected Switch widget from Lenra's Figma design.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.52%. Comparing base (26cc6d8) to head (3758e55).

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Additional details and impacted files

@@            Coverage Diff             @@
##             beta     #123      +/-   ##
==========================================
- Coverage   71.71%   71.52%   -0.19%     
==========================================
  Files          38       38              
  Lines         912      906       -6     
==========================================
- Hits          654      648       -6     
  Misses        258      258              

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[shiipou]

🎉 This PR is included in version 1.0.0-beta.53 🎉

The release is available on GitHub release

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