Add TemplateName parameter to Invoke-Plaster with argument completer

[joshooaj]

This PR is purely a convenience change which makes it possible to skip using Get-PlasterTemplate and instead use the -TemplateName parameter and tab through the available options.

This...

$template = Get-PlasterTemplate | Where-Object Name -eq NewPowerShellModule
Invoke-Plaster -TemplatePath $template.TemplatePath -DestinationPath .\MyNewModule

Becomes this...

Invoke-Plaster -TemplateName NewPowerShellModule -DestinationPath .\MyNewModule

[HeyItsGilbert]

How would this work for multiple versions?

[joshooaj]

Oh good Q, not sure yet. I'll look into it when I get back to my desk!

[joshooaj]

I was thinking about an optional -TemplateVersion parameter in the TemplateName parameterset, so I installed a couple different versions of the Templates module to try it out and noticed you can have multiple module versions with the same template version in them.

So maybe...

• If only one matching template is found, just use it, no need to specify version.
• If the version is provided and it's unique, use it.
• If the there are multiple versions and the version wasn't specified, prompt to pick one?
• If there are multiple versions but the version numbers aren't unique, throw an error and tell the user to grab the template path using Get-PlasterTemplate instead?

[HeyItsGilbert]

Sounds good!