[FEATURE REQUEST] Automatically check if .svg files contain width and height attributes

### I have searched through the issues and didn't find my problem.

- [X] Confirm

### Problem

Icons should use the `viewbox` attribute instead of the `width` and `height` attributes. Atm we have to check this manually when reviewing a PR, but it can easily be automated with `check-bot`

### Possible Solution

Add checks to `check-bot` and respond with an error message if any .svg files in a PR contain width and/or height attributes

### Additional information

_No response_

Start by locating the existing check-bot checks for pull requests and review how they report validation errors. Add a check for .svg files containing width or height attributes, and verify that a pull request with those attributes receives an error while compliant SVG files pass.

Written by the indexing model from the issue text.