rad cli could use auto completion to make the commands more user friendly

[nithyatsu]

Today, a lot of rad cli commands take arguments like resource group, resource types etc.
We also have to specify a fully qualified resource type(ex: applications.core/container) for our rad resource commands because of introduction of UDT. This requires a good amount of typing.

Some tools, like kubernetes can autocomplete names for us, for instance if we type kubectl get pods -n mynamespace, we can expect pod names to be auto completed although they are "dynamic" list.

https://chromium.googlesource.com/external/github.com/spf13/cobra/+/94a87a7b83bda98e918cf7a4793f41372a5e4139/bash_completions.md captures a potential approach for cobra commands.

We should investigate and add this feature for UX enhancement.

AB#14660

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