Introducting PowerLine module

Added ExistingModules to packages, for module dependent package manifest
Moved PowerLine styling code to the PowerLine pacakge.
Added Package install code generation to Get-MyModules.
Fixed typo in EnsureJoinString
Fixed: Scoop operations would fail calling internal url function.

base/Get-MyModules.ps1

@@ -1,4 +1,4 @@
-param([switch]$IgnoreSystem,[switch]$MissingOnly)
+param([switch]$IgnoreSystem,[switch]$MissingOnly,[switch]$GenInstallCode)
 
 $local:currentSys = @('Always') + ([SystemName]::_GetValidValues('',$true,$true));
 
@@ -9,6 +9,7 @@ $local:oldPSGet = Get-Module PowerShellGet -ListAvailable -ErrorAction SilentlyC
 if( $local:oldPSGet ) {
     Write-Warning $(@(
           "PowerShellGet is an old version ($($oldPSGet.Version)), the following code should upgrade it"
+        , "#   Set-PSRepository -Name PSGallery -InstallationPolicy Trusted"
         , "    [Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12"
         , "    Install-PackageProvider -Name NuGet -Force"
         , "    Remove-Module PowerShellGet"
@@ -17,6 +18,10 @@ if( $local:oldPSGet ) {
     ) -join "`n" )
 }
 
+if( $GenInstallCode ) {
+    $MissingOnly = $true
+    "# Set-PSRepository -Name PSGallery -InstallationPolicy Trusted"
+}
 [MyConfig]::GetConfigPaths('mymodules',$false) |
     ForEach-Object { 
         $local:modules = $( Get-Content $_ | ConvertFrom-Json );
@@ -33,4 +38,8 @@ if( $local:oldPSGet ) {
             -not (Get-Module -ListAvailable $_ -ErrorAction stop)
             } catch { $true }
         )
+    } | ForEach-Object {
+       if( -not $GenInstallCode ) { return $_ }
+       "Write-Host -ForegroundColor Cyan 'Installing $_...';"
+       "Install-Module $_ -AllowClobber"
     }