load all partial scripts to caller context.

Load-PartialScripts.ps1

# load all partial scripts to caller context.
# - for caller, add `. "$(Split-Path $PSCommandPath)\Load-PartialScripts.ps1"`;
# - the partial scripts must named `{caller}.{partial}.ps1`;

foreach (
    $item in $(
        Get-ChildItem `
                    -Path $(Split-Path $MyInvocation.PSCommandPath -Parent -Resolve) `
                    -Filter "$(Split-Path $MyInvocation.PSCommandPath -LeafBase).*$(Split-Path $MyInvocation.PSCommandPath -Extension)" `
        | Sort-Object { Split-Path $_ -LeafBase }
    )
) {
    . $item.FullName
}