Hi @rough-pharmacist-5170, Thank you for working on it!
If you want to see live example where ui-library component is integrated in another project, then you can check footer component in flint.ui. otherwise for individual component you can look at the docs section of each component in the storybook.
Creating new app will on take a person to integrate components of ui-library.
Regarding your 3nd question, I am quite unsure. I didn't find any issues in any browser but @bitter-egg-22620 please let us know if you are aware about it.