feat: add logo and favicons

[akselthomsen]

Pull request

Summary

Adds logo and favicons.

Changes Made

• Added logo
• Added to README
• Build favicons with pkgdown::build_favicons()

Testing

• Logo included in new pkgdown webpage.

Checklist

• Code changes have been tested
• Documentation has been updated, if applicable
• All automated tests pass
• Coding style and naming conventions have been followed
• The PR is ready for review and merge

[github-actions]

Code coverage

Name	Coverage (%)
mighty.component	100
R/component.R	100
R/custom_r.R	100
R/mighty_component_rendered.R	100
R/mighty_component.R	100
R/standard.R	100
R/utils-validation.R	100
R/validate_component_code.R	100
R/validate_implicit_join.R	100

[github-actions]

Github pages

Review the pkgdown webpage for the PR here

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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