docs: add karma-material-reporter plugin

[ameerthehacker]

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[googlebot]

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[ameerthehacker]

I signed it!

[googlebot]

CLAs look good, thanks!

[karmarunnerbot]

🎉 This PR is included in version 5.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀