docs(icons-react): update usage on readme (#3390)
docs(icons-react): update usage on readme (#3390)

* docs(icons-react): update usage on readme

* chore(icons-react): remove storybook example with inline style

* docs(icons-react): remove interactive example from style section

* docs(icons-react): update link to point to icon library

* docs(icons-react): add opacity info for two-tone icons

carbon-design-system/carbon-components,carbon-design-system/carbon-components,carbon-design-system/carbon-components