Hiding all OS instructions in the New Workspace Setup by default

[balacij]

Seeing the New Workspace Wiki this year, I think the document looks larger than it effectively is for each OS. I think we should wrap each related operating systems instructions, where it makes sense, using `details` nodes. (OPEN ME!)

See how this can hide text irrelevant to me if I use one OS and don't care for the instructions of another?

The scheme is as follows:

<details>

<summary>Operating System X</summary>

Instructions go here

</details>

[smiths]

Sounds like a good idea to me @balacij. This seems like a good newcomer issue.

[BilalM04]

@balacij I updated the wiki, please check it out.

[balacij]

Thank you, @BilalM04! It looks great!