[Enhancement]: Place accounts’ directories within a superordinate `nextcloud` directory.

### How to use GitHub

1. Please use the 👍 [reaction](https://blog.github.com/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/) to show that you are interested into the same feature.

1. Please don't comment if you have no relevant information to add. It's just extra noise for everyone subscribed to this issue.

1. Subscribe to receive notifications on status change and new comments.

### Feature request

#### **Is your feature request related to a problem?**

When a user has multiple accounts added, their `$HOME` can become as the undermentioned demonstrates:

1. ```PS1
tree "$HOME" -L 1
```

1. ```tree
/home/RokeJulianLockhart
├── Nextcloud
├── Nextcloud2
├── Nextcloud3
├── Nextcloud4
├── Nextcloud5
├── Nextcloud6
└── Nextcloud7
```

This becomes incredibly frustrating past 15 accounts.

#### **Describe the solution you'd like**

Instead, it should be:

```tree
/home/RokeJulianLockhart
└── Nextcloud
   ├── Nextcloud1
   ├── Nextcloud2
   ├── Nextcloud3
   ├── Nextcloud4
   ├── Nextcloud5
   ├── Nextcloud6
   └── Nextcloud7
```

#### **Describe alternatives you've considered**

```tree
/home/RokeJulianLockhart
└── Nextcloud
   ├── wim.nl.tab.digital
   ├── de.tab.digital
   ├── nch.pl
   ├── collaborate.kde.org
   ├── nextcloud05.webo.cloud
   ├── murena.io_1
   └── murena.io_2
```

This would be ideal.

#### **Additional context**

Version


nextcloud-client-3.14.2-2.fc40.x86_64.rpm