Intellisense for parameters (is slow to show) when constructing PS1/AzCLI commands that deploy a bicep file

# Is your feature request related to a problem? Please describe.
When constructing `New-AzResourceGroupDeployment` commands that deploy a bicep file, I have to go back to the bicep file to reference all the parameters that I need to pass.

# Describe the solution you'd like
It would be very helpful to have the same IDE helpers that I get when writing a reference to a Bicep module (type, description, allowed values, maybe even the default value). Detection on when to show this may be a bit tricky if I'm construction the `@{}` object with the parameters and then passing it to the `New-AzResourceGroupDeployment` command, but there should be a way to indicate that manually (or some syntax in comments that could be used).

Start by examining the existing IDE helpers for Bicep module references and how New-AzResourceGroupDeployment commands or @{} parameter objects are detected. Define how parameter type, description, allowed values, and defaults should be surfaced, including any explicit syntax for ambiguous cases; done means those helpers appear reliably when constructing deployments.

Written by the indexing model from the issue text.