Global rename of terms

Instead of:
```yaml
- where:
subject: (.*)VirtualMachineScaleSet(.*)
set:
alias: ${verb}-Az${subject-prefix}${subject}
- where:
parameter-name: (.*)VirtualMachineScaleSet(.*)
set:
alias: $1VirtualMachineScaleSet$2
- where:
subject: (.*)VirtualMachineScaleSet(.*)
set:
subject: $1Vmss$2
- where:
parameter-name: (.*)VirtualMachineScaleSet(.*)
set:
parameter-name: $1Vmss$2
```
(which doesn't even cover property/class names) is needed to do some basic term renaming. Here: `VirtualMachineScaleSet -> Vmss`. We need global term renaming. This would be a configuration directive. It would rename a term anywhere, such as:
- Cmdlet names
- Parameter names
- Class names
- Property names

This would vastly simplify a lot of configuration.