Creating better hints for the icon color check workflow

[okineadev]

If I see an error in the icon color check workflow, I have to go to its log to find out which colors need to be replaced to match the Material Design palette

I think it would be better if it sent a comment with color hints something like this:

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🎨❌ Error in icon colors

• luau.svg:

  • Invalid color #00A2FF
    • Suggestions: #42A5F5, #039BE5, #03A9F4, #2196F3, #00B0FF
  • Invalid color white
    • Suggestions: #FAFAFA, #F5F5F5, #EEEEEE, #ECEFF1, #EFEBE9

• rbxmk.svg:

  • Invalid color #13BD2A
    • Suggestions: #00C853, #4CAF50, #66BB6A, #7CB342, #43A047

• ...

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Useful links:

• Material Design color palette
• Guide on using colors in icons

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It should work similar to icon-review.yml, if there is already such a comment, then replace it