Documentation: Add installation instructions to README

[igeligel]

What should be changed?

• [ ] An example is missing
• [X] Existing documentation needs to be extended
• [ ] Something else, state below:

Description

Under the Usage section in the README, an installation instruction should be given. Create a sub heading + a collapsible installation instruction for either yarn and npm, similar to cogo-toast (yarn / npm).

The collapsible area can be done similar to:

<details>
 <summary>npm</summary>

```bash
npm command
\```

</details>

Files involved

• README.md

[hambali999]

Hi can i take over this issue? This is my first hacktobefest as a starter :) #28