list resource with a given resource type under a certain resource group

**Is your feature request related to a problem? Please describe.**
Under a certain resource group, a specific bicep function can list/get resource(s) filtered by a given resource type

It's similar to `az resource list` az cli command, for example:

`az resource list --resource-type Microsoft.Network/virtualNetworks -g --subscription <sub>`</sub>

Start by comparing the requested Bicep function behavior with the shown `az resource list --resource-type ... -g ... --subscription ...` command. Define the resource type, resource group, and subscription inputs and confirm the expected filtered resource result before identifying the relevant Bicep function entry points and tests.

Written by the indexing model from the issue text.