Add @mui/icons-material as default on Installation page (Docs)

[igorradovanov]

• I have searched the issues of this repository and believe that this is not a duplicate.

Summary 💡

Many component demos are using the Icons and for new users, this can be confusing because the default list of dependencies does not include the installation of the @mui/icons-material module:

// with npm
npm install @mui/material @emotion/react @emotion/styled

// with yarn
yarn add @mui/material @emotion/react @emotion/styled

Examples 🌈

When a user tries to use a demo component, they will be presented with the next error due that @mui/icons-material is not installed by default:

Motivation 🔦

I think this will improve the docs and onboarding of new users.

[mnajdova]

Thanks for the feedback. We have a section for icons just below that one, here is the one specific to the SVG icons - https://next.material-ui.com/getting-started/installation/#svg-icons

It's riskier to add it in the default installation command, as people may consider it required in order for the material components to be used.