chore(example): add a full color icons page for designers

[Feichtmeier]

You can find it in the web app when this is merged here: https://ubuntu.github.io/yaru.dart/

Clicking the icon will bring you to the extracted file online

CC @d-loose @anasereijo

[github-actions[bot]]

No release type found in pull request title "Full_color_icons". Add a prefix to indicate what kind of release this pull request corresponds to. For reference, see https://www.conventionalcommits.org/

Available types:

• feat: A new feature
• fix: A bug fix
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
• refactor: A code change that neither fixes a bug nor adds a feature
• perf: A code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
• ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit

[Jupi007]

This looks so cool! I will review it this evening 👍

[anasereijo]

This looks amazing! It's nice to have everything in one place. Very useful, thanks!