feat: add image extension to rich text editor

[belyas]

This PR tackles the image extension for issue #246
I added Image extension, so users can add images to places where full rich text editor is used as shown in the screenshots

Checklist

• I have read the contributing guidelines.
• My code is of good quality and follows the coding standards of the project.
• I have tested my changes, and they work as expected.

Thank you for your contribution! 🎉

[github-actions]

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[belyas]

I have read the CLA Document and I hereby sign the CLA

[daveearley]

Awesome! Thanks for the contribution, @belyas. I'll review this later today.

[daveearley]

Thanks again @belyas! I hope you don't mind, but I made a few changes to bring the styles inline with the rest of the application. I also added some basic resize functionality to the images.