feature: More advanced Blazor examples

[MarioPL98]

Not related to any specific problem, just looking for optimal ways to do some stuff.

Describe the solution you'd like

1. Example that shows how to use https://www.reactiveui.net/docs/handbook/collections/ with @foreach. Maybe a list of text fields, with something done when all data is entered into all of them.
2. Example that shows how to add child components dynamically and interact with them. Maybe couple of cards as child elements that can be added dynamically with button press and each of them contains a checkbox.
3. Example that shows how to access url parameters in ViewModels.

Describe alternatives you've considered
N/A

Describe suggestions on how to achieve the feature
Add more examples.

Additional context
N/A

[M0n7y5]

any update on this?