Goal:
As a developer, be able to inject a script dynamically. For example from a controller, a filter, or a service.

Design suggestion:

• Create a ITagHelperComponentManager for devs to resolve it and add new ITagHelperComponent instances.
• ITagHelperComponentManager could be a DI-registered composite of ITagHelperComponent. (need to solve what order it should have compared to other DI-registered ones)
• Create a ScriptTagHelperComponent and other types of resources that can be used directly from code.

Usages examples:

• From a view or a view component, we can register custom scripts
  • Inject the ITagHelperComponentManager in the view
  • Call `tagHelperComponentManager.Add(new ScriptTagHelperComponent("jquery.js"))
• From a filter or a controller, inject a script based on some condition.

Other ideas:
We could also provide some methods on the manager, or extension methods, to prevent duplicate scripts. Like TryAddScript(string), TryAddStylesheet(string). These could also be available as Tag Helpers.
A future need will be to provide another service to handle a sort of DI container for client assets (dependencies, orders, cdn, hash, async, ...) that would ultimately register components on this ITagHelperComponentManager.