HTML and CSS Helper Functions

We should have set of HTML functions that wrap New-UDElement. For example:

```powershell
New-UDDiv -Content {
"A div!"
}
```

We should then include some aliases to make it nice and terse.

```powershell
div {
a -href 'https://www.powershelluniversal.com' { "PowerShell Universal" }
}
```

We should also include a function for CSS styling. It would have all the valid CSS style properties and return a hashtable.

```powershell
$Style = New-UDCSSStyle -BackgroundColor 'red' -Display 'flex'
```

This would be a good exercise for an LLM. I tried ChatGPT, but it didn't really get there. I think we could add this to the [Tools](https://github.com/ironmansoftware/gallery/tree/main/Apps/PowerShellUniversal.Apps.Tools) module.

We could also consider making something like PowerShellUniversal.Apps.HTML