Add param block snippet

Summary of the new feature

On my stream with Scott Hanselman, he wasn’t sure on how to write a param block because we have snippets for individual parameters, not param blocks.

I’d be nice to have a snippet of a param block, with a parameter inside.

Proposed technical implementation details (optional)

Take the current parameter snippet, and wrap it in a param block and call it the param-block snippet.

[rkeithhill]

I think there’s a difference between a “teaching” style snippet and a “productivity” snippet. The above, as a productivity snippet, wouldn’t work for me because I’d end up deleting more stuff than I would have typed in the first place. For me, this would be a productivity snippet:

[CmdletBinding()]
param(
    [Parameter()]
    [${1:type-name}]
    $${2:parameter-name}
)
$0

[AspenForester]

Something like this: Note where the $0 moved to.

"Parameter_Block" : {
        "prefix": "param-block",
        "body": ["[CmdletBinding()]",
            "param (",
        "    [parameter()]",
        "    [${1:TypeName}]",
        "    $${2:ParameterName}$0",
        ")"],
        "description": "A Parameter block to get you started."
    }