Dynamic comment snippets should work on script file parameter blocks

Could the new comment insert be updated to support anonymous functions? 

Perhaps triggering when the first subsequent non-comment line is `[CmdletBinding()]`


Example:
```powershell

#function Get-VSCodeInfo {
[CmdletBinding()]
[OutputType([])]
param(


)

begin {
}

process {

}

end {
}
#}
```
