Show parameter help in the parameter tooltips

[MartinGC94]

Prerequisites

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Summary

Similar to how the completion tooltip for commands include a summary of the command, it would be nice if the parameters also included the parameter help. So for ls -Path the tooltip would show:

[string[]]
Specifies a path to one or more locations. Wildcards are accepted. The default location is the current directory (`.`).

Proposed Design

No response

[JustinGrote]

Related to #3026, when we sort out some of the LSP stuff to keep this from lagging the interface (especially as help can be slow to resolve) or if we can't we can gate it behind a setting and warn that hovers may take longer to resolve.

[MartinGC94]

I don't think there's a setting for the command help we get when completing command names and I haven't heard anyone complain about that so I'm not sure if a setting for this is really needed, but of course it doesn't hurt to have it.
I hadn't thought about showing the help when hovering over the parameter but that's a good idea as well.

[JustinGrote]

It's certainly something I want to improve and I'll put it on my to-do list, we just may need to gate it behind a feature flag for some kinds of lookups if it turns out to really slow down the hover/completer