Add support for grouping Routes

[Badgerati]

Description of the Change

Adds support for grouping Routes, to make it easier to give multiple routes shared data - such as middleware, auth, base paths, etc.

This has been added for Routes, Static Routes, and Signal Routes:

• Add-PodeRouteGroup
• Add-PodeStaticRouteGroup
• Add-PodeSignalRouteGroup

Examples

For example, the below will add 3 Routes which all share a /api base path; some Basic authentication, and some other middleware:

$mid = New-PodeMiddleware -ScriptBlock {
    'some middleware being run' | Out-Default
}
Add-PodeRouteGroup -Path '/api' -Authentication Basic -Middleware $mid -Routes {
    Add-PodeRoute -Method Get -Path '/route1' -ScriptBlock {
        Write-PodeJsonResponse -Value @{ ID = 1 }
    }
    Add-PodeRoute -Method Get -Path '/route2' -ScriptBlock {
        Write-PodeJsonResponse -Value @{ ID = 2 }
    }
    Add-PodeRoute -Method Get -Path '/route3' -ScriptBlock {
        Write-PodeJsonResponse -Value @{ ID = 3 }
    }
}

When run, you'll have 3 Routes that all need some Basic authentication at /api/route1, /api/route2, and /api/route3.