refactor(CtaIcon): reduce boilerplate, utilize Icon component

[Readpato]

Summary

• Utilize Iconify component
• Utilize Carbon Icons by default
• Utilize UnoCSS preset attributify
• Fix bug on Cta* that was duplicat ing the class attribute

Changes

What kind of change does this PR introduce? (check at least one by adding an "x" between the brackets)

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update
• [X] Refactor
• [ ] Build-related changes
• [ ] Other, please describe:

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [X] No

The PR fulfills these requirements:

• [X] Schrödinger Hat code of conduct

If adding a new feature, the PR's description includes:

• [ ] A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

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