Add help texts for all input fields

[SchoolGuy]

Is your feature request related to a problem? Please describe.

As an unexperienced user
I want to be guided when using Cobbler
so that I don't have to open external documentation for every click.

Describe the solution you'd like

I don't think it is set in stone how to do this but the most prominent options that I know are:

1. Tooltips on the input field itself: https://v17.material.angular.io/components/tooltip/overview
2. Icon Buttons with the help icon that have tooltips.
3. Icon Buttons with the help icon that offer to link to external documentation

Describe alternatives you've considered

None

Additional context

None